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d0722149 DE |
1 | /* GNU/Linux/x86-64 specific low level interface, for the remote server |
2 | for GDB. | |
b811d2c2 | 3 | Copyright (C) 2002-2020 Free Software Foundation, Inc. |
d0722149 DE |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
d41f6d8e | 20 | #include "server.h" |
d0722149 | 21 | #include <signal.h> |
6a271cae | 22 | #include <limits.h> |
f4647387 | 23 | #include <inttypes.h> |
d0722149 DE |
24 | #include "linux-low.h" |
25 | #include "i387-fp.h" | |
df7e5265 | 26 | #include "x86-low.h" |
268a13a5 | 27 | #include "gdbsupport/x86-xstate.h" |
5826e159 | 28 | #include "nat/gdb_ptrace.h" |
d0722149 | 29 | |
93813b37 WT |
30 | #ifdef __x86_64__ |
31 | #include "nat/amd64-linux-siginfo.h" | |
32 | #endif | |
33 | ||
d0722149 | 34 | #include "gdb_proc_service.h" |
b5737fa9 PA |
35 | /* Don't include elf/common.h if linux/elf.h got included by |
36 | gdb_proc_service.h. */ | |
37 | #ifndef ELFMAG0 | |
38 | #include "elf/common.h" | |
39 | #endif | |
40 | ||
268a13a5 | 41 | #include "gdbsupport/agent.h" |
3aee8918 | 42 | #include "tdesc.h" |
c144c7a0 | 43 | #include "tracepoint.h" |
f699aaba | 44 | #include "ax.h" |
7b669087 | 45 | #include "nat/linux-nat.h" |
4b134ca1 | 46 | #include "nat/x86-linux.h" |
8e5d4070 | 47 | #include "nat/x86-linux-dregs.h" |
ae91f625 | 48 | #include "linux-x86-tdesc.h" |
a196ebeb | 49 | |
3aee8918 PA |
50 | #ifdef __x86_64__ |
51 | static struct target_desc *tdesc_amd64_linux_no_xml; | |
52 | #endif | |
53 | static struct target_desc *tdesc_i386_linux_no_xml; | |
54 | ||
1570b33e | 55 | |
fa593d66 | 56 | static unsigned char jump_insn[] = { 0xe9, 0, 0, 0, 0 }; |
405f8e94 | 57 | static unsigned char small_jump_insn[] = { 0x66, 0xe9, 0, 0 }; |
fa593d66 | 58 | |
1570b33e L |
59 | /* Backward compatibility for gdb without XML support. */ |
60 | ||
61 | static const char *xmltarget_i386_linux_no_xml = "@<target>\ | |
62 | <architecture>i386</architecture>\ | |
63 | <osabi>GNU/Linux</osabi>\ | |
64 | </target>"; | |
f6d1620c L |
65 | |
66 | #ifdef __x86_64__ | |
1570b33e L |
67 | static const char *xmltarget_amd64_linux_no_xml = "@<target>\ |
68 | <architecture>i386:x86-64</architecture>\ | |
69 | <osabi>GNU/Linux</osabi>\ | |
70 | </target>"; | |
f6d1620c | 71 | #endif |
d0722149 DE |
72 | |
73 | #include <sys/reg.h> | |
74 | #include <sys/procfs.h> | |
1570b33e L |
75 | #include <sys/uio.h> |
76 | ||
d0722149 DE |
77 | #ifndef PTRACE_GET_THREAD_AREA |
78 | #define PTRACE_GET_THREAD_AREA 25 | |
79 | #endif | |
80 | ||
81 | /* This definition comes from prctl.h, but some kernels may not have it. */ | |
82 | #ifndef PTRACE_ARCH_PRCTL | |
83 | #define PTRACE_ARCH_PRCTL 30 | |
84 | #endif | |
85 | ||
86 | /* The following definitions come from prctl.h, but may be absent | |
87 | for certain configurations. */ | |
88 | #ifndef ARCH_GET_FS | |
89 | #define ARCH_SET_GS 0x1001 | |
90 | #define ARCH_SET_FS 0x1002 | |
91 | #define ARCH_GET_FS 0x1003 | |
92 | #define ARCH_GET_GS 0x1004 | |
93 | #endif | |
94 | ||
ef0478f6 TBA |
95 | /* Linux target op definitions for the x86 architecture. |
96 | This is initialized assuming an amd64 target. | |
97 | 'low_arch_setup' will correct it for i386 or amd64 targets. */ | |
98 | ||
99 | class x86_target : public linux_process_target | |
100 | { | |
101 | public: | |
102 | ||
aa8d21c9 TBA |
103 | const regs_info *get_regs_info () override; |
104 | ||
3ca4edb6 TBA |
105 | const gdb_byte *sw_breakpoint_from_kind (int kind, int *size) override; |
106 | ||
007c9b97 TBA |
107 | bool supports_z_point_type (char z_type) override; |
108 | ||
a5b5da92 TBA |
109 | void process_qsupported (char **features, int count) override; |
110 | ||
47f70aa7 TBA |
111 | bool supports_tracepoints () override; |
112 | ||
797bcff5 TBA |
113 | protected: |
114 | ||
115 | void low_arch_setup () override; | |
daca57a7 TBA |
116 | |
117 | bool low_cannot_fetch_register (int regno) override; | |
118 | ||
119 | bool low_cannot_store_register (int regno) override; | |
bf9ae9d8 TBA |
120 | |
121 | bool low_supports_breakpoints () override; | |
122 | ||
123 | CORE_ADDR low_get_pc (regcache *regcache) override; | |
124 | ||
125 | void low_set_pc (regcache *regcache, CORE_ADDR newpc) override; | |
d4807ea2 TBA |
126 | |
127 | int low_decr_pc_after_break () override; | |
d7146cda TBA |
128 | |
129 | bool low_breakpoint_at (CORE_ADDR pc) override; | |
9db9aa23 TBA |
130 | |
131 | int low_insert_point (raw_bkpt_type type, CORE_ADDR addr, | |
132 | int size, raw_breakpoint *bp) override; | |
133 | ||
134 | int low_remove_point (raw_bkpt_type type, CORE_ADDR addr, | |
135 | int size, raw_breakpoint *bp) override; | |
ac1bbaca TBA |
136 | |
137 | bool low_stopped_by_watchpoint () override; | |
138 | ||
139 | CORE_ADDR low_stopped_data_address () override; | |
b35db733 TBA |
140 | |
141 | /* collect_ptrace_register/supply_ptrace_register are not needed in the | |
142 | native i386 case (no registers smaller than an xfer unit), and are not | |
143 | used in the biarch case (HAVE_LINUX_USRREGS is not defined). */ | |
cb63de7c TBA |
144 | |
145 | /* Need to fix up i386 siginfo if host is amd64. */ | |
146 | bool low_siginfo_fixup (siginfo_t *native, gdb_byte *inf, | |
147 | int direction) override; | |
fd000fb3 TBA |
148 | |
149 | arch_process_info *low_new_process () override; | |
150 | ||
151 | void low_delete_process (arch_process_info *info) override; | |
152 | ||
153 | void low_new_thread (lwp_info *) override; | |
154 | ||
155 | void low_delete_thread (arch_lwp_info *) override; | |
156 | ||
157 | void low_new_fork (process_info *parent, process_info *child) override; | |
d7599cc0 TBA |
158 | |
159 | void low_prepare_to_resume (lwp_info *lwp) override; | |
a5b5da92 | 160 | |
13e567af TBA |
161 | int low_get_thread_area (int lwpid, CORE_ADDR *addrp) override; |
162 | ||
a5b5da92 TBA |
163 | private: |
164 | ||
165 | /* Update all the target description of all processes; a new GDB | |
166 | connected, and it may or not support xml target descriptions. */ | |
167 | void update_xmltarget (); | |
ef0478f6 TBA |
168 | }; |
169 | ||
170 | /* The singleton target ops object. */ | |
171 | ||
172 | static x86_target the_x86_target; | |
173 | ||
aa5ca48f DE |
174 | /* Per-process arch-specific data we want to keep. */ |
175 | ||
176 | struct arch_process_info | |
177 | { | |
df7e5265 | 178 | struct x86_debug_reg_state debug_reg_state; |
aa5ca48f DE |
179 | }; |
180 | ||
d0722149 DE |
181 | #ifdef __x86_64__ |
182 | ||
183 | /* Mapping between the general-purpose registers in `struct user' | |
184 | format and GDB's register array layout. | |
185 | Note that the transfer layout uses 64-bit regs. */ | |
186 | static /*const*/ int i386_regmap[] = | |
187 | { | |
188 | RAX * 8, RCX * 8, RDX * 8, RBX * 8, | |
189 | RSP * 8, RBP * 8, RSI * 8, RDI * 8, | |
190 | RIP * 8, EFLAGS * 8, CS * 8, SS * 8, | |
191 | DS * 8, ES * 8, FS * 8, GS * 8 | |
192 | }; | |
193 | ||
194 | #define I386_NUM_REGS (sizeof (i386_regmap) / sizeof (i386_regmap[0])) | |
195 | ||
196 | /* So code below doesn't have to care, i386 or amd64. */ | |
197 | #define ORIG_EAX ORIG_RAX | |
bc9540e8 | 198 | #define REGSIZE 8 |
d0722149 DE |
199 | |
200 | static const int x86_64_regmap[] = | |
201 | { | |
202 | RAX * 8, RBX * 8, RCX * 8, RDX * 8, | |
203 | RSI * 8, RDI * 8, RBP * 8, RSP * 8, | |
204 | R8 * 8, R9 * 8, R10 * 8, R11 * 8, | |
205 | R12 * 8, R13 * 8, R14 * 8, R15 * 8, | |
206 | RIP * 8, EFLAGS * 8, CS * 8, SS * 8, | |
207 | DS * 8, ES * 8, FS * 8, GS * 8, | |
208 | -1, -1, -1, -1, -1, -1, -1, -1, | |
209 | -1, -1, -1, -1, -1, -1, -1, -1, | |
210 | -1, -1, -1, -1, -1, -1, -1, -1, | |
a196ebeb WT |
211 | -1, |
212 | -1, -1, -1, -1, -1, -1, -1, -1, | |
213 | ORIG_RAX * 8, | |
2735833d WT |
214 | #ifdef HAVE_STRUCT_USER_REGS_STRUCT_FS_BASE |
215 | 21 * 8, 22 * 8, | |
216 | #else | |
217 | -1, -1, | |
218 | #endif | |
a196ebeb | 219 | -1, -1, -1, -1, /* MPX registers BND0 ... BND3. */ |
01f9f808 MS |
220 | -1, -1, /* MPX registers BNDCFGU, BNDSTATUS. */ |
221 | -1, -1, -1, -1, -1, -1, -1, -1, /* xmm16 ... xmm31 (AVX512) */ | |
222 | -1, -1, -1, -1, -1, -1, -1, -1, | |
223 | -1, -1, -1, -1, -1, -1, -1, -1, /* ymm16 ... ymm31 (AVX512) */ | |
224 | -1, -1, -1, -1, -1, -1, -1, -1, | |
225 | -1, -1, -1, -1, -1, -1, -1, -1, /* k0 ... k7 (AVX512) */ | |
226 | -1, -1, -1, -1, -1, -1, -1, -1, /* zmm0 ... zmm31 (AVX512) */ | |
227 | -1, -1, -1, -1, -1, -1, -1, -1, | |
228 | -1, -1, -1, -1, -1, -1, -1, -1, | |
51547df6 MS |
229 | -1, -1, -1, -1, -1, -1, -1, -1, |
230 | -1 /* pkru */ | |
d0722149 DE |
231 | }; |
232 | ||
233 | #define X86_64_NUM_REGS (sizeof (x86_64_regmap) / sizeof (x86_64_regmap[0])) | |
9e0aa64f | 234 | #define X86_64_USER_REGS (GS + 1) |
d0722149 DE |
235 | |
236 | #else /* ! __x86_64__ */ | |
237 | ||
238 | /* Mapping between the general-purpose registers in `struct user' | |
239 | format and GDB's register array layout. */ | |
240 | static /*const*/ int i386_regmap[] = | |
241 | { | |
242 | EAX * 4, ECX * 4, EDX * 4, EBX * 4, | |
243 | UESP * 4, EBP * 4, ESI * 4, EDI * 4, | |
244 | EIP * 4, EFL * 4, CS * 4, SS * 4, | |
245 | DS * 4, ES * 4, FS * 4, GS * 4 | |
246 | }; | |
247 | ||
248 | #define I386_NUM_REGS (sizeof (i386_regmap) / sizeof (i386_regmap[0])) | |
249 | ||
bc9540e8 PA |
250 | #define REGSIZE 4 |
251 | ||
d0722149 | 252 | #endif |
3aee8918 PA |
253 | |
254 | #ifdef __x86_64__ | |
255 | ||
256 | /* Returns true if the current inferior belongs to a x86-64 process, | |
257 | per the tdesc. */ | |
258 | ||
259 | static int | |
260 | is_64bit_tdesc (void) | |
261 | { | |
0bfdf32f | 262 | struct regcache *regcache = get_thread_regcache (current_thread, 0); |
3aee8918 PA |
263 | |
264 | return register_size (regcache->tdesc, 0) == 8; | |
265 | } | |
266 | ||
267 | #endif | |
268 | ||
d0722149 DE |
269 | \f |
270 | /* Called by libthread_db. */ | |
271 | ||
272 | ps_err_e | |
754653a7 | 273 | ps_get_thread_area (struct ps_prochandle *ph, |
d0722149 DE |
274 | lwpid_t lwpid, int idx, void **base) |
275 | { | |
276 | #ifdef __x86_64__ | |
3aee8918 | 277 | int use_64bit = is_64bit_tdesc (); |
d0722149 DE |
278 | |
279 | if (use_64bit) | |
280 | { | |
281 | switch (idx) | |
282 | { | |
283 | case FS: | |
284 | if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_FS) == 0) | |
285 | return PS_OK; | |
286 | break; | |
287 | case GS: | |
288 | if (ptrace (PTRACE_ARCH_PRCTL, lwpid, base, ARCH_GET_GS) == 0) | |
289 | return PS_OK; | |
290 | break; | |
291 | default: | |
292 | return PS_BADADDR; | |
293 | } | |
294 | return PS_ERR; | |
295 | } | |
296 | #endif | |
297 | ||
298 | { | |
299 | unsigned int desc[4]; | |
300 | ||
301 | if (ptrace (PTRACE_GET_THREAD_AREA, lwpid, | |
302 | (void *) (intptr_t) idx, (unsigned long) &desc) < 0) | |
303 | return PS_ERR; | |
304 | ||
d1ec4ce7 DE |
305 | /* Ensure we properly extend the value to 64-bits for x86_64. */ |
306 | *base = (void *) (uintptr_t) desc[1]; | |
d0722149 DE |
307 | return PS_OK; |
308 | } | |
309 | } | |
fa593d66 PA |
310 | |
311 | /* Get the thread area address. This is used to recognize which | |
312 | thread is which when tracing with the in-process agent library. We | |
313 | don't read anything from the address, and treat it as opaque; it's | |
314 | the address itself that we assume is unique per-thread. */ | |
315 | ||
13e567af TBA |
316 | int |
317 | x86_target::low_get_thread_area (int lwpid, CORE_ADDR *addr) | |
fa593d66 PA |
318 | { |
319 | #ifdef __x86_64__ | |
3aee8918 | 320 | int use_64bit = is_64bit_tdesc (); |
fa593d66 PA |
321 | |
322 | if (use_64bit) | |
323 | { | |
324 | void *base; | |
325 | if (ptrace (PTRACE_ARCH_PRCTL, lwpid, &base, ARCH_GET_FS) == 0) | |
326 | { | |
327 | *addr = (CORE_ADDR) (uintptr_t) base; | |
328 | return 0; | |
329 | } | |
330 | ||
331 | return -1; | |
332 | } | |
333 | #endif | |
334 | ||
335 | { | |
f2907e49 | 336 | struct lwp_info *lwp = find_lwp_pid (ptid_t (lwpid)); |
d86d4aaf DE |
337 | struct thread_info *thr = get_lwp_thread (lwp); |
338 | struct regcache *regcache = get_thread_regcache (thr, 1); | |
fa593d66 PA |
339 | unsigned int desc[4]; |
340 | ULONGEST gs = 0; | |
341 | const int reg_thread_area = 3; /* bits to scale down register value. */ | |
342 | int idx; | |
343 | ||
344 | collect_register_by_name (regcache, "gs", &gs); | |
345 | ||
346 | idx = gs >> reg_thread_area; | |
347 | ||
348 | if (ptrace (PTRACE_GET_THREAD_AREA, | |
d86d4aaf | 349 | lwpid_of (thr), |
493e2a69 | 350 | (void *) (long) idx, (unsigned long) &desc) < 0) |
fa593d66 PA |
351 | return -1; |
352 | ||
353 | *addr = desc[1]; | |
354 | return 0; | |
355 | } | |
356 | } | |
357 | ||
358 | ||
d0722149 | 359 | \f |
daca57a7 TBA |
360 | bool |
361 | x86_target::low_cannot_store_register (int regno) | |
d0722149 | 362 | { |
3aee8918 PA |
363 | #ifdef __x86_64__ |
364 | if (is_64bit_tdesc ()) | |
daca57a7 | 365 | return false; |
3aee8918 PA |
366 | #endif |
367 | ||
d0722149 DE |
368 | return regno >= I386_NUM_REGS; |
369 | } | |
370 | ||
daca57a7 TBA |
371 | bool |
372 | x86_target::low_cannot_fetch_register (int regno) | |
d0722149 | 373 | { |
3aee8918 PA |
374 | #ifdef __x86_64__ |
375 | if (is_64bit_tdesc ()) | |
daca57a7 | 376 | return false; |
3aee8918 PA |
377 | #endif |
378 | ||
d0722149 DE |
379 | return regno >= I386_NUM_REGS; |
380 | } | |
381 | ||
382 | static void | |
442ea881 | 383 | x86_fill_gregset (struct regcache *regcache, void *buf) |
d0722149 DE |
384 | { |
385 | int i; | |
386 | ||
387 | #ifdef __x86_64__ | |
3aee8918 | 388 | if (register_size (regcache->tdesc, 0) == 8) |
d0722149 DE |
389 | { |
390 | for (i = 0; i < X86_64_NUM_REGS; i++) | |
391 | if (x86_64_regmap[i] != -1) | |
442ea881 | 392 | collect_register (regcache, i, ((char *) buf) + x86_64_regmap[i]); |
2735833d WT |
393 | |
394 | #ifndef HAVE_STRUCT_USER_REGS_STRUCT_FS_BASE | |
395 | { | |
396 | unsigned long base; | |
397 | int lwpid = lwpid_of (current_thread); | |
398 | ||
399 | collect_register_by_name (regcache, "fs_base", &base); | |
400 | ptrace (PTRACE_ARCH_PRCTL, lwpid, &base, ARCH_SET_FS); | |
401 | ||
402 | collect_register_by_name (regcache, "gs_base", &base); | |
403 | ptrace (PTRACE_ARCH_PRCTL, lwpid, &base, ARCH_SET_GS); | |
404 | } | |
405 | #endif | |
406 | ||
d0722149 DE |
407 | return; |
408 | } | |
9e0aa64f JK |
409 | |
410 | /* 32-bit inferior registers need to be zero-extended. | |
411 | Callers would read uninitialized memory otherwise. */ | |
412 | memset (buf, 0x00, X86_64_USER_REGS * 8); | |
d0722149 DE |
413 | #endif |
414 | ||
415 | for (i = 0; i < I386_NUM_REGS; i++) | |
442ea881 | 416 | collect_register (regcache, i, ((char *) buf) + i386_regmap[i]); |
d0722149 | 417 | |
442ea881 | 418 | collect_register_by_name (regcache, "orig_eax", |
bc9540e8 | 419 | ((char *) buf) + ORIG_EAX * REGSIZE); |
3f52fdbc | 420 | |
e90a813d | 421 | #ifdef __x86_64__ |
3f52fdbc KB |
422 | /* Sign extend EAX value to avoid potential syscall restart |
423 | problems. | |
424 | ||
425 | See amd64_linux_collect_native_gregset() in gdb/amd64-linux-nat.c | |
426 | for a detailed explanation. */ | |
427 | if (register_size (regcache->tdesc, 0) == 4) | |
428 | { | |
429 | void *ptr = ((gdb_byte *) buf | |
430 | + i386_regmap[find_regno (regcache->tdesc, "eax")]); | |
431 | ||
432 | *(int64_t *) ptr = *(int32_t *) ptr; | |
433 | } | |
e90a813d | 434 | #endif |
d0722149 DE |
435 | } |
436 | ||
437 | static void | |
442ea881 | 438 | x86_store_gregset (struct regcache *regcache, const void *buf) |
d0722149 DE |
439 | { |
440 | int i; | |
441 | ||
442 | #ifdef __x86_64__ | |
3aee8918 | 443 | if (register_size (regcache->tdesc, 0) == 8) |
d0722149 DE |
444 | { |
445 | for (i = 0; i < X86_64_NUM_REGS; i++) | |
446 | if (x86_64_regmap[i] != -1) | |
442ea881 | 447 | supply_register (regcache, i, ((char *) buf) + x86_64_regmap[i]); |
2735833d WT |
448 | |
449 | #ifndef HAVE_STRUCT_USER_REGS_STRUCT_FS_BASE | |
450 | { | |
451 | unsigned long base; | |
452 | int lwpid = lwpid_of (current_thread); | |
453 | ||
454 | if (ptrace (PTRACE_ARCH_PRCTL, lwpid, &base, ARCH_GET_FS) == 0) | |
455 | supply_register_by_name (regcache, "fs_base", &base); | |
456 | ||
457 | if (ptrace (PTRACE_ARCH_PRCTL, lwpid, &base, ARCH_GET_GS) == 0) | |
458 | supply_register_by_name (regcache, "gs_base", &base); | |
459 | } | |
460 | #endif | |
d0722149 DE |
461 | return; |
462 | } | |
463 | #endif | |
464 | ||
465 | for (i = 0; i < I386_NUM_REGS; i++) | |
442ea881 | 466 | supply_register (regcache, i, ((char *) buf) + i386_regmap[i]); |
d0722149 | 467 | |
442ea881 | 468 | supply_register_by_name (regcache, "orig_eax", |
bc9540e8 | 469 | ((char *) buf) + ORIG_EAX * REGSIZE); |
d0722149 DE |
470 | } |
471 | ||
472 | static void | |
442ea881 | 473 | x86_fill_fpregset (struct regcache *regcache, void *buf) |
d0722149 DE |
474 | { |
475 | #ifdef __x86_64__ | |
442ea881 | 476 | i387_cache_to_fxsave (regcache, buf); |
d0722149 | 477 | #else |
442ea881 | 478 | i387_cache_to_fsave (regcache, buf); |
d0722149 DE |
479 | #endif |
480 | } | |
481 | ||
482 | static void | |
442ea881 | 483 | x86_store_fpregset (struct regcache *regcache, const void *buf) |
d0722149 DE |
484 | { |
485 | #ifdef __x86_64__ | |
442ea881 | 486 | i387_fxsave_to_cache (regcache, buf); |
d0722149 | 487 | #else |
442ea881 | 488 | i387_fsave_to_cache (regcache, buf); |
d0722149 DE |
489 | #endif |
490 | } | |
491 | ||
492 | #ifndef __x86_64__ | |
493 | ||
494 | static void | |
442ea881 | 495 | x86_fill_fpxregset (struct regcache *regcache, void *buf) |
d0722149 | 496 | { |
442ea881 | 497 | i387_cache_to_fxsave (regcache, buf); |
d0722149 DE |
498 | } |
499 | ||
500 | static void | |
442ea881 | 501 | x86_store_fpxregset (struct regcache *regcache, const void *buf) |
d0722149 | 502 | { |
442ea881 | 503 | i387_fxsave_to_cache (regcache, buf); |
d0722149 DE |
504 | } |
505 | ||
506 | #endif | |
507 | ||
1570b33e L |
508 | static void |
509 | x86_fill_xstateregset (struct regcache *regcache, void *buf) | |
510 | { | |
511 | i387_cache_to_xsave (regcache, buf); | |
512 | } | |
513 | ||
514 | static void | |
515 | x86_store_xstateregset (struct regcache *regcache, const void *buf) | |
516 | { | |
517 | i387_xsave_to_cache (regcache, buf); | |
518 | } | |
519 | ||
d0722149 DE |
520 | /* ??? The non-biarch i386 case stores all the i387 regs twice. |
521 | Once in i387_.*fsave.* and once in i387_.*fxsave.*. | |
522 | This is, presumably, to handle the case where PTRACE_[GS]ETFPXREGS | |
523 | doesn't work. IWBN to avoid the duplication in the case where it | |
524 | does work. Maybe the arch_setup routine could check whether it works | |
3aee8918 | 525 | and update the supported regsets accordingly. */ |
d0722149 | 526 | |
3aee8918 | 527 | static struct regset_info x86_regsets[] = |
d0722149 DE |
528 | { |
529 | #ifdef HAVE_PTRACE_GETREGS | |
1570b33e | 530 | { PTRACE_GETREGS, PTRACE_SETREGS, 0, sizeof (elf_gregset_t), |
d0722149 DE |
531 | GENERAL_REGS, |
532 | x86_fill_gregset, x86_store_gregset }, | |
1570b33e L |
533 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_X86_XSTATE, 0, |
534 | EXTENDED_REGS, x86_fill_xstateregset, x86_store_xstateregset }, | |
d0722149 DE |
535 | # ifndef __x86_64__ |
536 | # ifdef HAVE_PTRACE_GETFPXREGS | |
1570b33e | 537 | { PTRACE_GETFPXREGS, PTRACE_SETFPXREGS, 0, sizeof (elf_fpxregset_t), |
d0722149 DE |
538 | EXTENDED_REGS, |
539 | x86_fill_fpxregset, x86_store_fpxregset }, | |
540 | # endif | |
541 | # endif | |
1570b33e | 542 | { PTRACE_GETFPREGS, PTRACE_SETFPREGS, 0, sizeof (elf_fpregset_t), |
d0722149 DE |
543 | FP_REGS, |
544 | x86_fill_fpregset, x86_store_fpregset }, | |
545 | #endif /* HAVE_PTRACE_GETREGS */ | |
50bc912a | 546 | NULL_REGSET |
d0722149 DE |
547 | }; |
548 | ||
bf9ae9d8 TBA |
549 | bool |
550 | x86_target::low_supports_breakpoints () | |
551 | { | |
552 | return true; | |
553 | } | |
554 | ||
555 | CORE_ADDR | |
556 | x86_target::low_get_pc (regcache *regcache) | |
d0722149 | 557 | { |
3aee8918 | 558 | int use_64bit = register_size (regcache->tdesc, 0) == 8; |
d0722149 DE |
559 | |
560 | if (use_64bit) | |
561 | { | |
6598661d PA |
562 | uint64_t pc; |
563 | ||
442ea881 | 564 | collect_register_by_name (regcache, "rip", &pc); |
d0722149 DE |
565 | return (CORE_ADDR) pc; |
566 | } | |
567 | else | |
568 | { | |
6598661d PA |
569 | uint32_t pc; |
570 | ||
442ea881 | 571 | collect_register_by_name (regcache, "eip", &pc); |
d0722149 DE |
572 | return (CORE_ADDR) pc; |
573 | } | |
574 | } | |
575 | ||
bf9ae9d8 TBA |
576 | void |
577 | x86_target::low_set_pc (regcache *regcache, CORE_ADDR pc) | |
d0722149 | 578 | { |
3aee8918 | 579 | int use_64bit = register_size (regcache->tdesc, 0) == 8; |
d0722149 DE |
580 | |
581 | if (use_64bit) | |
582 | { | |
6598661d PA |
583 | uint64_t newpc = pc; |
584 | ||
442ea881 | 585 | supply_register_by_name (regcache, "rip", &newpc); |
d0722149 DE |
586 | } |
587 | else | |
588 | { | |
6598661d PA |
589 | uint32_t newpc = pc; |
590 | ||
442ea881 | 591 | supply_register_by_name (regcache, "eip", &newpc); |
d0722149 DE |
592 | } |
593 | } | |
d4807ea2 TBA |
594 | |
595 | int | |
596 | x86_target::low_decr_pc_after_break () | |
597 | { | |
598 | return 1; | |
599 | } | |
600 | ||
d0722149 | 601 | \f |
dd373349 | 602 | static const gdb_byte x86_breakpoint[] = { 0xCC }; |
d0722149 DE |
603 | #define x86_breakpoint_len 1 |
604 | ||
d7146cda TBA |
605 | bool |
606 | x86_target::low_breakpoint_at (CORE_ADDR pc) | |
d0722149 DE |
607 | { |
608 | unsigned char c; | |
609 | ||
d7146cda | 610 | read_memory (pc, &c, 1); |
d0722149 | 611 | if (c == 0xCC) |
d7146cda | 612 | return true; |
d0722149 | 613 | |
d7146cda | 614 | return false; |
d0722149 DE |
615 | } |
616 | \f | |
42995dbd | 617 | /* Low-level function vector. */ |
df7e5265 | 618 | struct x86_dr_low_type x86_dr_low = |
42995dbd | 619 | { |
d33472ad GB |
620 | x86_linux_dr_set_control, |
621 | x86_linux_dr_set_addr, | |
622 | x86_linux_dr_get_addr, | |
623 | x86_linux_dr_get_status, | |
624 | x86_linux_dr_get_control, | |
42995dbd GB |
625 | sizeof (void *), |
626 | }; | |
aa5ca48f | 627 | \f |
90d74c30 | 628 | /* Breakpoint/Watchpoint support. */ |
aa5ca48f | 629 | |
007c9b97 TBA |
630 | bool |
631 | x86_target::supports_z_point_type (char z_type) | |
802e8e6d PA |
632 | { |
633 | switch (z_type) | |
634 | { | |
635 | case Z_PACKET_SW_BP: | |
636 | case Z_PACKET_HW_BP: | |
637 | case Z_PACKET_WRITE_WP: | |
638 | case Z_PACKET_ACCESS_WP: | |
007c9b97 | 639 | return true; |
802e8e6d | 640 | default: |
007c9b97 | 641 | return false; |
802e8e6d PA |
642 | } |
643 | } | |
644 | ||
9db9aa23 TBA |
645 | int |
646 | x86_target::low_insert_point (raw_bkpt_type type, CORE_ADDR addr, | |
647 | int size, raw_breakpoint *bp) | |
aa5ca48f DE |
648 | { |
649 | struct process_info *proc = current_process (); | |
802e8e6d | 650 | |
aa5ca48f DE |
651 | switch (type) |
652 | { | |
802e8e6d PA |
653 | case raw_bkpt_type_hw: |
654 | case raw_bkpt_type_write_wp: | |
655 | case raw_bkpt_type_access_wp: | |
a4165e94 | 656 | { |
802e8e6d PA |
657 | enum target_hw_bp_type hw_type |
658 | = raw_bkpt_type_to_target_hw_bp_type (type); | |
df7e5265 | 659 | struct x86_debug_reg_state *state |
fe978cb0 | 660 | = &proc->priv->arch_private->debug_reg_state; |
a4165e94 | 661 | |
df7e5265 | 662 | return x86_dr_insert_watchpoint (state, hw_type, addr, size); |
a4165e94 | 663 | } |
961bd387 | 664 | |
aa5ca48f DE |
665 | default: |
666 | /* Unsupported. */ | |
667 | return 1; | |
668 | } | |
669 | } | |
670 | ||
9db9aa23 TBA |
671 | int |
672 | x86_target::low_remove_point (raw_bkpt_type type, CORE_ADDR addr, | |
673 | int size, raw_breakpoint *bp) | |
aa5ca48f DE |
674 | { |
675 | struct process_info *proc = current_process (); | |
802e8e6d | 676 | |
aa5ca48f DE |
677 | switch (type) |
678 | { | |
802e8e6d PA |
679 | case raw_bkpt_type_hw: |
680 | case raw_bkpt_type_write_wp: | |
681 | case raw_bkpt_type_access_wp: | |
a4165e94 | 682 | { |
802e8e6d PA |
683 | enum target_hw_bp_type hw_type |
684 | = raw_bkpt_type_to_target_hw_bp_type (type); | |
df7e5265 | 685 | struct x86_debug_reg_state *state |
fe978cb0 | 686 | = &proc->priv->arch_private->debug_reg_state; |
a4165e94 | 687 | |
df7e5265 | 688 | return x86_dr_remove_watchpoint (state, hw_type, addr, size); |
a4165e94 | 689 | } |
aa5ca48f DE |
690 | default: |
691 | /* Unsupported. */ | |
692 | return 1; | |
693 | } | |
694 | } | |
695 | ||
ac1bbaca TBA |
696 | bool |
697 | x86_target::low_stopped_by_watchpoint () | |
aa5ca48f DE |
698 | { |
699 | struct process_info *proc = current_process (); | |
fe978cb0 | 700 | return x86_dr_stopped_by_watchpoint (&proc->priv->arch_private->debug_reg_state); |
aa5ca48f DE |
701 | } |
702 | ||
ac1bbaca TBA |
703 | CORE_ADDR |
704 | x86_target::low_stopped_data_address () | |
aa5ca48f DE |
705 | { |
706 | struct process_info *proc = current_process (); | |
707 | CORE_ADDR addr; | |
fe978cb0 | 708 | if (x86_dr_stopped_data_address (&proc->priv->arch_private->debug_reg_state, |
df7e5265 | 709 | &addr)) |
aa5ca48f DE |
710 | return addr; |
711 | return 0; | |
712 | } | |
713 | \f | |
714 | /* Called when a new process is created. */ | |
715 | ||
fd000fb3 TBA |
716 | arch_process_info * |
717 | x86_target::low_new_process () | |
aa5ca48f | 718 | { |
ed859da7 | 719 | struct arch_process_info *info = XCNEW (struct arch_process_info); |
aa5ca48f | 720 | |
df7e5265 | 721 | x86_low_init_dregs (&info->debug_reg_state); |
aa5ca48f DE |
722 | |
723 | return info; | |
724 | } | |
725 | ||
04ec7890 SM |
726 | /* Called when a process is being deleted. */ |
727 | ||
fd000fb3 TBA |
728 | void |
729 | x86_target::low_delete_process (arch_process_info *info) | |
04ec7890 SM |
730 | { |
731 | xfree (info); | |
732 | } | |
733 | ||
fd000fb3 TBA |
734 | void |
735 | x86_target::low_new_thread (lwp_info *lwp) | |
736 | { | |
737 | /* This comes from nat/. */ | |
738 | x86_linux_new_thread (lwp); | |
739 | } | |
3a8a0396 | 740 | |
fd000fb3 TBA |
741 | void |
742 | x86_target::low_delete_thread (arch_lwp_info *alwp) | |
743 | { | |
744 | /* This comes from nat/. */ | |
745 | x86_linux_delete_thread (alwp); | |
746 | } | |
747 | ||
748 | /* Target routine for new_fork. */ | |
749 | ||
750 | void | |
751 | x86_target::low_new_fork (process_info *parent, process_info *child) | |
3a8a0396 DB |
752 | { |
753 | /* These are allocated by linux_add_process. */ | |
754 | gdb_assert (parent->priv != NULL | |
755 | && parent->priv->arch_private != NULL); | |
756 | gdb_assert (child->priv != NULL | |
757 | && child->priv->arch_private != NULL); | |
758 | ||
759 | /* Linux kernel before 2.6.33 commit | |
760 | 72f674d203cd230426437cdcf7dd6f681dad8b0d | |
761 | will inherit hardware debug registers from parent | |
762 | on fork/vfork/clone. Newer Linux kernels create such tasks with | |
763 | zeroed debug registers. | |
764 | ||
765 | GDB core assumes the child inherits the watchpoints/hw | |
766 | breakpoints of the parent, and will remove them all from the | |
767 | forked off process. Copy the debug registers mirrors into the | |
768 | new process so that all breakpoints and watchpoints can be | |
769 | removed together. The debug registers mirror will become zeroed | |
770 | in the end before detaching the forked off process, thus making | |
771 | this compatible with older Linux kernels too. */ | |
772 | ||
773 | *child->priv->arch_private = *parent->priv->arch_private; | |
774 | } | |
775 | ||
d7599cc0 TBA |
776 | void |
777 | x86_target::low_prepare_to_resume (lwp_info *lwp) | |
778 | { | |
779 | /* This comes from nat/. */ | |
780 | x86_linux_prepare_to_resume (lwp); | |
781 | } | |
782 | ||
70a0bb6b GB |
783 | /* See nat/x86-dregs.h. */ |
784 | ||
785 | struct x86_debug_reg_state * | |
786 | x86_debug_reg_state (pid_t pid) | |
787 | { | |
788 | struct process_info *proc = find_process_pid (pid); | |
789 | ||
790 | return &proc->priv->arch_private->debug_reg_state; | |
791 | } | |
aa5ca48f | 792 | \f |
d0722149 DE |
793 | /* When GDBSERVER is built as a 64-bit application on linux, the |
794 | PTRACE_GETSIGINFO data is always presented in 64-bit layout. Since | |
795 | debugging a 32-bit inferior with a 64-bit GDBSERVER should look the same | |
796 | as debugging it with a 32-bit GDBSERVER, we do the 32-bit <-> 64-bit | |
797 | conversion in-place ourselves. */ | |
798 | ||
9cf12d57 | 799 | /* Convert a ptrace/host siginfo object, into/from the siginfo in the |
d0722149 DE |
800 | layout of the inferiors' architecture. Returns true if any |
801 | conversion was done; false otherwise. If DIRECTION is 1, then copy | |
9cf12d57 | 802 | from INF to PTRACE. If DIRECTION is 0, copy from PTRACE to |
d0722149 DE |
803 | INF. */ |
804 | ||
cb63de7c TBA |
805 | bool |
806 | x86_target::low_siginfo_fixup (siginfo_t *ptrace, gdb_byte *inf, int direction) | |
d0722149 DE |
807 | { |
808 | #ifdef __x86_64__ | |
760256f9 | 809 | unsigned int machine; |
0bfdf32f | 810 | int tid = lwpid_of (current_thread); |
760256f9 PA |
811 | int is_elf64 = linux_pid_exe_is_elf_64_file (tid, &machine); |
812 | ||
d0722149 | 813 | /* Is the inferior 32-bit? If so, then fixup the siginfo object. */ |
3aee8918 | 814 | if (!is_64bit_tdesc ()) |
9cf12d57 | 815 | return amd64_linux_siginfo_fixup_common (ptrace, inf, direction, |
c23bbc1c | 816 | FIXUP_32); |
c92b5177 | 817 | /* No fixup for native x32 GDB. */ |
760256f9 | 818 | else if (!is_elf64 && sizeof (void *) == 8) |
9cf12d57 | 819 | return amd64_linux_siginfo_fixup_common (ptrace, inf, direction, |
c23bbc1c | 820 | FIXUP_X32); |
d0722149 DE |
821 | #endif |
822 | ||
cb63de7c | 823 | return false; |
d0722149 DE |
824 | } |
825 | \f | |
1570b33e L |
826 | static int use_xml; |
827 | ||
3aee8918 PA |
828 | /* Format of XSAVE extended state is: |
829 | struct | |
830 | { | |
831 | fxsave_bytes[0..463] | |
832 | sw_usable_bytes[464..511] | |
833 | xstate_hdr_bytes[512..575] | |
834 | avx_bytes[576..831] | |
835 | future_state etc | |
836 | }; | |
837 | ||
838 | Same memory layout will be used for the coredump NT_X86_XSTATE | |
839 | representing the XSAVE extended state registers. | |
840 | ||
841 | The first 8 bytes of the sw_usable_bytes[464..467] is the OS enabled | |
842 | extended state mask, which is the same as the extended control register | |
843 | 0 (the XFEATURE_ENABLED_MASK register), XCR0. We can use this mask | |
844 | together with the mask saved in the xstate_hdr_bytes to determine what | |
845 | states the processor/OS supports and what state, used or initialized, | |
846 | the process/thread is in. */ | |
847 | #define I386_LINUX_XSAVE_XCR0_OFFSET 464 | |
848 | ||
849 | /* Does the current host support the GETFPXREGS request? The header | |
850 | file may or may not define it, and even if it is defined, the | |
851 | kernel will return EIO if it's running on a pre-SSE processor. */ | |
852 | int have_ptrace_getfpxregs = | |
853 | #ifdef HAVE_PTRACE_GETFPXREGS | |
854 | -1 | |
855 | #else | |
856 | 0 | |
857 | #endif | |
858 | ; | |
1570b33e | 859 | |
3aee8918 PA |
860 | /* Get Linux/x86 target description from running target. */ |
861 | ||
862 | static const struct target_desc * | |
863 | x86_linux_read_description (void) | |
1570b33e | 864 | { |
3aee8918 PA |
865 | unsigned int machine; |
866 | int is_elf64; | |
a196ebeb | 867 | int xcr0_features; |
3aee8918 PA |
868 | int tid; |
869 | static uint64_t xcr0; | |
3a13a53b | 870 | struct regset_info *regset; |
1570b33e | 871 | |
0bfdf32f | 872 | tid = lwpid_of (current_thread); |
1570b33e | 873 | |
3aee8918 | 874 | is_elf64 = linux_pid_exe_is_elf_64_file (tid, &machine); |
45ba0d02 | 875 | |
3aee8918 | 876 | if (sizeof (void *) == 4) |
3a13a53b | 877 | { |
3aee8918 PA |
878 | if (is_elf64 > 0) |
879 | error (_("Can't debug 64-bit process with 32-bit GDBserver")); | |
880 | #ifndef __x86_64__ | |
881 | else if (machine == EM_X86_64) | |
882 | error (_("Can't debug x86-64 process with 32-bit GDBserver")); | |
883 | #endif | |
884 | } | |
3a13a53b | 885 | |
3aee8918 PA |
886 | #if !defined __x86_64__ && defined HAVE_PTRACE_GETFPXREGS |
887 | if (machine == EM_386 && have_ptrace_getfpxregs == -1) | |
888 | { | |
889 | elf_fpxregset_t fpxregs; | |
3a13a53b | 890 | |
3aee8918 | 891 | if (ptrace (PTRACE_GETFPXREGS, tid, 0, (long) &fpxregs) < 0) |
3a13a53b | 892 | { |
3aee8918 PA |
893 | have_ptrace_getfpxregs = 0; |
894 | have_ptrace_getregset = 0; | |
f49ff000 | 895 | return i386_linux_read_description (X86_XSTATE_X87); |
3a13a53b | 896 | } |
3aee8918 PA |
897 | else |
898 | have_ptrace_getfpxregs = 1; | |
3a13a53b | 899 | } |
1570b33e L |
900 | #endif |
901 | ||
902 | if (!use_xml) | |
903 | { | |
df7e5265 | 904 | x86_xcr0 = X86_XSTATE_SSE_MASK; |
3aee8918 | 905 | |
1570b33e L |
906 | /* Don't use XML. */ |
907 | #ifdef __x86_64__ | |
3aee8918 PA |
908 | if (machine == EM_X86_64) |
909 | return tdesc_amd64_linux_no_xml; | |
1570b33e | 910 | else |
1570b33e | 911 | #endif |
3aee8918 | 912 | return tdesc_i386_linux_no_xml; |
1570b33e L |
913 | } |
914 | ||
1570b33e L |
915 | if (have_ptrace_getregset == -1) |
916 | { | |
df7e5265 | 917 | uint64_t xstateregs[(X86_XSTATE_SSE_SIZE / sizeof (uint64_t))]; |
1570b33e | 918 | struct iovec iov; |
1570b33e L |
919 | |
920 | iov.iov_base = xstateregs; | |
921 | iov.iov_len = sizeof (xstateregs); | |
922 | ||
923 | /* Check if PTRACE_GETREGSET works. */ | |
3aee8918 PA |
924 | if (ptrace (PTRACE_GETREGSET, tid, |
925 | (unsigned int) NT_X86_XSTATE, (long) &iov) < 0) | |
926 | have_ptrace_getregset = 0; | |
927 | else | |
1570b33e | 928 | { |
3aee8918 PA |
929 | have_ptrace_getregset = 1; |
930 | ||
931 | /* Get XCR0 from XSAVE extended state. */ | |
932 | xcr0 = xstateregs[(I386_LINUX_XSAVE_XCR0_OFFSET | |
933 | / sizeof (uint64_t))]; | |
934 | ||
935 | /* Use PTRACE_GETREGSET if it is available. */ | |
936 | for (regset = x86_regsets; | |
937 | regset->fill_function != NULL; regset++) | |
938 | if (regset->get_request == PTRACE_GETREGSET) | |
df7e5265 | 939 | regset->size = X86_XSTATE_SIZE (xcr0); |
3aee8918 PA |
940 | else if (regset->type != GENERAL_REGS) |
941 | regset->size = 0; | |
1570b33e | 942 | } |
1570b33e L |
943 | } |
944 | ||
3aee8918 | 945 | /* Check the native XCR0 only if PTRACE_GETREGSET is available. */ |
a196ebeb | 946 | xcr0_features = (have_ptrace_getregset |
2e1e43e1 | 947 | && (xcr0 & X86_XSTATE_ALL_MASK)); |
3aee8918 | 948 | |
a196ebeb | 949 | if (xcr0_features) |
3aee8918 | 950 | x86_xcr0 = xcr0; |
1570b33e | 951 | |
3aee8918 PA |
952 | if (machine == EM_X86_64) |
953 | { | |
1570b33e | 954 | #ifdef __x86_64__ |
b4570e4b | 955 | const target_desc *tdesc = NULL; |
a196ebeb | 956 | |
b4570e4b | 957 | if (xcr0_features) |
3aee8918 | 958 | { |
b4570e4b YQ |
959 | tdesc = amd64_linux_read_description (xcr0 & X86_XSTATE_ALL_MASK, |
960 | !is_elf64); | |
1570b33e | 961 | } |
b4570e4b YQ |
962 | |
963 | if (tdesc == NULL) | |
964 | tdesc = amd64_linux_read_description (X86_XSTATE_SSE_MASK, !is_elf64); | |
965 | return tdesc; | |
3aee8918 | 966 | #endif |
1570b33e | 967 | } |
3aee8918 PA |
968 | else |
969 | { | |
f49ff000 | 970 | const target_desc *tdesc = NULL; |
a1fa17ee | 971 | |
f49ff000 YQ |
972 | if (xcr0_features) |
973 | tdesc = i386_linux_read_description (xcr0 & X86_XSTATE_ALL_MASK); | |
2b863f51 | 974 | |
f49ff000 YQ |
975 | if (tdesc == NULL) |
976 | tdesc = i386_linux_read_description (X86_XSTATE_SSE); | |
a196ebeb | 977 | |
f49ff000 | 978 | return tdesc; |
3aee8918 PA |
979 | } |
980 | ||
981 | gdb_assert_not_reached ("failed to return tdesc"); | |
982 | } | |
983 | ||
3aee8918 PA |
984 | /* Update all the target description of all processes; a new GDB |
985 | connected, and it may or not support xml target descriptions. */ | |
986 | ||
797bcff5 TBA |
987 | void |
988 | x86_target::update_xmltarget () | |
3aee8918 | 989 | { |
0bfdf32f | 990 | struct thread_info *saved_thread = current_thread; |
3aee8918 PA |
991 | |
992 | /* Before changing the register cache's internal layout, flush the | |
993 | contents of the current valid caches back to the threads, and | |
994 | release the current regcache objects. */ | |
995 | regcache_release (); | |
996 | ||
797bcff5 | 997 | for_each_process ([this] (process_info *proc) { |
9179355e SM |
998 | int pid = proc->pid; |
999 | ||
1000 | /* Look up any thread of this process. */ | |
1001 | current_thread = find_any_thread_of_pid (pid); | |
1002 | ||
797bcff5 | 1003 | low_arch_setup (); |
9179355e | 1004 | }); |
3aee8918 | 1005 | |
0bfdf32f | 1006 | current_thread = saved_thread; |
1570b33e L |
1007 | } |
1008 | ||
1009 | /* Process qSupported query, "xmlRegisters=". Update the buffer size for | |
1010 | PTRACE_GETREGSET. */ | |
1011 | ||
a5b5da92 TBA |
1012 | void |
1013 | x86_target::process_qsupported (char **features, int count) | |
1570b33e | 1014 | { |
06e03fff PA |
1015 | int i; |
1016 | ||
1570b33e L |
1017 | /* Return if gdb doesn't support XML. If gdb sends "xmlRegisters=" |
1018 | with "i386" in qSupported query, it supports x86 XML target | |
1019 | descriptions. */ | |
1020 | use_xml = 0; | |
06e03fff | 1021 | for (i = 0; i < count; i++) |
1570b33e | 1022 | { |
06e03fff | 1023 | const char *feature = features[i]; |
1570b33e | 1024 | |
06e03fff | 1025 | if (startswith (feature, "xmlRegisters=")) |
1570b33e | 1026 | { |
06e03fff | 1027 | char *copy = xstrdup (feature + 13); |
06e03fff | 1028 | |
ca3a04f6 CB |
1029 | char *saveptr; |
1030 | for (char *p = strtok_r (copy, ",", &saveptr); | |
1031 | p != NULL; | |
1032 | p = strtok_r (NULL, ",", &saveptr)) | |
1570b33e | 1033 | { |
06e03fff PA |
1034 | if (strcmp (p, "i386") == 0) |
1035 | { | |
1036 | use_xml = 1; | |
1037 | break; | |
1038 | } | |
1570b33e | 1039 | } |
1570b33e | 1040 | |
06e03fff PA |
1041 | free (copy); |
1042 | } | |
1570b33e | 1043 | } |
a5b5da92 | 1044 | update_xmltarget (); |
1570b33e L |
1045 | } |
1046 | ||
3aee8918 | 1047 | /* Common for x86/x86-64. */ |
d0722149 | 1048 | |
3aee8918 PA |
1049 | static struct regsets_info x86_regsets_info = |
1050 | { | |
1051 | x86_regsets, /* regsets */ | |
1052 | 0, /* num_regsets */ | |
1053 | NULL, /* disabled_regsets */ | |
1054 | }; | |
214d508e L |
1055 | |
1056 | #ifdef __x86_64__ | |
3aee8918 PA |
1057 | static struct regs_info amd64_linux_regs_info = |
1058 | { | |
1059 | NULL, /* regset_bitmap */ | |
1060 | NULL, /* usrregs_info */ | |
1061 | &x86_regsets_info | |
1062 | }; | |
d0722149 | 1063 | #endif |
3aee8918 PA |
1064 | static struct usrregs_info i386_linux_usrregs_info = |
1065 | { | |
1066 | I386_NUM_REGS, | |
1067 | i386_regmap, | |
1068 | }; | |
d0722149 | 1069 | |
3aee8918 PA |
1070 | static struct regs_info i386_linux_regs_info = |
1071 | { | |
1072 | NULL, /* regset_bitmap */ | |
1073 | &i386_linux_usrregs_info, | |
1074 | &x86_regsets_info | |
1075 | }; | |
d0722149 | 1076 | |
aa8d21c9 TBA |
1077 | const regs_info * |
1078 | x86_target::get_regs_info () | |
3aee8918 PA |
1079 | { |
1080 | #ifdef __x86_64__ | |
1081 | if (is_64bit_tdesc ()) | |
1082 | return &amd64_linux_regs_info; | |
1083 | else | |
1084 | #endif | |
1085 | return &i386_linux_regs_info; | |
1086 | } | |
d0722149 | 1087 | |
3aee8918 PA |
1088 | /* Initialize the target description for the architecture of the |
1089 | inferior. */ | |
1570b33e | 1090 | |
797bcff5 TBA |
1091 | void |
1092 | x86_target::low_arch_setup () | |
3aee8918 PA |
1093 | { |
1094 | current_process ()->tdesc = x86_linux_read_description (); | |
d0722149 DE |
1095 | } |
1096 | ||
82075af2 JS |
1097 | /* Fill *SYSNO and *SYSRET with the syscall nr trapped and the syscall return |
1098 | code. This should only be called if LWP got a SYSCALL_SIGTRAP. */ | |
1099 | ||
1100 | static void | |
4cc32bec | 1101 | x86_get_syscall_trapinfo (struct regcache *regcache, int *sysno) |
82075af2 JS |
1102 | { |
1103 | int use_64bit = register_size (regcache->tdesc, 0) == 8; | |
1104 | ||
1105 | if (use_64bit) | |
1106 | { | |
1107 | long l_sysno; | |
82075af2 JS |
1108 | |
1109 | collect_register_by_name (regcache, "orig_rax", &l_sysno); | |
82075af2 | 1110 | *sysno = (int) l_sysno; |
82075af2 JS |
1111 | } |
1112 | else | |
4cc32bec | 1113 | collect_register_by_name (regcache, "orig_eax", sysno); |
82075af2 JS |
1114 | } |
1115 | ||
47f70aa7 TBA |
1116 | bool |
1117 | x86_target::supports_tracepoints () | |
219f2f23 | 1118 | { |
47f70aa7 | 1119 | return true; |
219f2f23 PA |
1120 | } |
1121 | ||
fa593d66 PA |
1122 | static void |
1123 | append_insns (CORE_ADDR *to, size_t len, const unsigned char *buf) | |
1124 | { | |
4196ab2a | 1125 | target_write_memory (*to, buf, len); |
fa593d66 PA |
1126 | *to += len; |
1127 | } | |
1128 | ||
1129 | static int | |
a121b7c1 | 1130 | push_opcode (unsigned char *buf, const char *op) |
fa593d66 PA |
1131 | { |
1132 | unsigned char *buf_org = buf; | |
1133 | ||
1134 | while (1) | |
1135 | { | |
1136 | char *endptr; | |
1137 | unsigned long ul = strtoul (op, &endptr, 16); | |
1138 | ||
1139 | if (endptr == op) | |
1140 | break; | |
1141 | ||
1142 | *buf++ = ul; | |
1143 | op = endptr; | |
1144 | } | |
1145 | ||
1146 | return buf - buf_org; | |
1147 | } | |
1148 | ||
1149 | #ifdef __x86_64__ | |
1150 | ||
1151 | /* Build a jump pad that saves registers and calls a collection | |
1152 | function. Writes a jump instruction to the jump pad to | |
1153 | JJUMPAD_INSN. The caller is responsible to write it in at the | |
1154 | tracepoint address. */ | |
1155 | ||
1156 | static int | |
1157 | amd64_install_fast_tracepoint_jump_pad (CORE_ADDR tpoint, CORE_ADDR tpaddr, | |
1158 | CORE_ADDR collector, | |
1159 | CORE_ADDR lockaddr, | |
1160 | ULONGEST orig_size, | |
1161 | CORE_ADDR *jump_entry, | |
405f8e94 SS |
1162 | CORE_ADDR *trampoline, |
1163 | ULONGEST *trampoline_size, | |
fa593d66 PA |
1164 | unsigned char *jjump_pad_insn, |
1165 | ULONGEST *jjump_pad_insn_size, | |
1166 | CORE_ADDR *adjusted_insn_addr, | |
405f8e94 SS |
1167 | CORE_ADDR *adjusted_insn_addr_end, |
1168 | char *err) | |
fa593d66 PA |
1169 | { |
1170 | unsigned char buf[40]; | |
1171 | int i, offset; | |
f4647387 YQ |
1172 | int64_t loffset; |
1173 | ||
fa593d66 PA |
1174 | CORE_ADDR buildaddr = *jump_entry; |
1175 | ||
1176 | /* Build the jump pad. */ | |
1177 | ||
1178 | /* First, do tracepoint data collection. Save registers. */ | |
1179 | i = 0; | |
1180 | /* Need to ensure stack pointer saved first. */ | |
1181 | buf[i++] = 0x54; /* push %rsp */ | |
1182 | buf[i++] = 0x55; /* push %rbp */ | |
1183 | buf[i++] = 0x57; /* push %rdi */ | |
1184 | buf[i++] = 0x56; /* push %rsi */ | |
1185 | buf[i++] = 0x52; /* push %rdx */ | |
1186 | buf[i++] = 0x51; /* push %rcx */ | |
1187 | buf[i++] = 0x53; /* push %rbx */ | |
1188 | buf[i++] = 0x50; /* push %rax */ | |
1189 | buf[i++] = 0x41; buf[i++] = 0x57; /* push %r15 */ | |
1190 | buf[i++] = 0x41; buf[i++] = 0x56; /* push %r14 */ | |
1191 | buf[i++] = 0x41; buf[i++] = 0x55; /* push %r13 */ | |
1192 | buf[i++] = 0x41; buf[i++] = 0x54; /* push %r12 */ | |
1193 | buf[i++] = 0x41; buf[i++] = 0x53; /* push %r11 */ | |
1194 | buf[i++] = 0x41; buf[i++] = 0x52; /* push %r10 */ | |
1195 | buf[i++] = 0x41; buf[i++] = 0x51; /* push %r9 */ | |
1196 | buf[i++] = 0x41; buf[i++] = 0x50; /* push %r8 */ | |
1197 | buf[i++] = 0x9c; /* pushfq */ | |
c8ef42ee | 1198 | buf[i++] = 0x48; /* movabs <addr>,%rdi */ |
fa593d66 | 1199 | buf[i++] = 0xbf; |
c8ef42ee PA |
1200 | memcpy (buf + i, &tpaddr, 8); |
1201 | i += 8; | |
fa593d66 PA |
1202 | buf[i++] = 0x57; /* push %rdi */ |
1203 | append_insns (&buildaddr, i, buf); | |
1204 | ||
1205 | /* Stack space for the collecting_t object. */ | |
1206 | i = 0; | |
1207 | i += push_opcode (&buf[i], "48 83 ec 18"); /* sub $0x18,%rsp */ | |
1208 | i += push_opcode (&buf[i], "48 b8"); /* mov <tpoint>,%rax */ | |
1209 | memcpy (buf + i, &tpoint, 8); | |
1210 | i += 8; | |
1211 | i += push_opcode (&buf[i], "48 89 04 24"); /* mov %rax,(%rsp) */ | |
1212 | i += push_opcode (&buf[i], | |
1213 | "64 48 8b 04 25 00 00 00 00"); /* mov %fs:0x0,%rax */ | |
1214 | i += push_opcode (&buf[i], "48 89 44 24 08"); /* mov %rax,0x8(%rsp) */ | |
1215 | append_insns (&buildaddr, i, buf); | |
1216 | ||
1217 | /* spin-lock. */ | |
1218 | i = 0; | |
1219 | i += push_opcode (&buf[i], "48 be"); /* movl <lockaddr>,%rsi */ | |
1220 | memcpy (&buf[i], (void *) &lockaddr, 8); | |
1221 | i += 8; | |
1222 | i += push_opcode (&buf[i], "48 89 e1"); /* mov %rsp,%rcx */ | |
1223 | i += push_opcode (&buf[i], "31 c0"); /* xor %eax,%eax */ | |
1224 | i += push_opcode (&buf[i], "f0 48 0f b1 0e"); /* lock cmpxchg %rcx,(%rsi) */ | |
1225 | i += push_opcode (&buf[i], "48 85 c0"); /* test %rax,%rax */ | |
1226 | i += push_opcode (&buf[i], "75 f4"); /* jne <again> */ | |
1227 | append_insns (&buildaddr, i, buf); | |
1228 | ||
1229 | /* Set up the gdb_collect call. */ | |
1230 | /* At this point, (stack pointer + 0x18) is the base of our saved | |
1231 | register block. */ | |
1232 | ||
1233 | i = 0; | |
1234 | i += push_opcode (&buf[i], "48 89 e6"); /* mov %rsp,%rsi */ | |
1235 | i += push_opcode (&buf[i], "48 83 c6 18"); /* add $0x18,%rsi */ | |
1236 | ||
1237 | /* tpoint address may be 64-bit wide. */ | |
1238 | i += push_opcode (&buf[i], "48 bf"); /* movl <addr>,%rdi */ | |
1239 | memcpy (buf + i, &tpoint, 8); | |
1240 | i += 8; | |
1241 | append_insns (&buildaddr, i, buf); | |
1242 | ||
1243 | /* The collector function being in the shared library, may be | |
1244 | >31-bits away off the jump pad. */ | |
1245 | i = 0; | |
1246 | i += push_opcode (&buf[i], "48 b8"); /* mov $collector,%rax */ | |
1247 | memcpy (buf + i, &collector, 8); | |
1248 | i += 8; | |
1249 | i += push_opcode (&buf[i], "ff d0"); /* callq *%rax */ | |
1250 | append_insns (&buildaddr, i, buf); | |
1251 | ||
1252 | /* Clear the spin-lock. */ | |
1253 | i = 0; | |
1254 | i += push_opcode (&buf[i], "31 c0"); /* xor %eax,%eax */ | |
1255 | i += push_opcode (&buf[i], "48 a3"); /* mov %rax, lockaddr */ | |
1256 | memcpy (buf + i, &lockaddr, 8); | |
1257 | i += 8; | |
1258 | append_insns (&buildaddr, i, buf); | |
1259 | ||
1260 | /* Remove stack that had been used for the collect_t object. */ | |
1261 | i = 0; | |
1262 | i += push_opcode (&buf[i], "48 83 c4 18"); /* add $0x18,%rsp */ | |
1263 | append_insns (&buildaddr, i, buf); | |
1264 | ||
1265 | /* Restore register state. */ | |
1266 | i = 0; | |
1267 | buf[i++] = 0x48; /* add $0x8,%rsp */ | |
1268 | buf[i++] = 0x83; | |
1269 | buf[i++] = 0xc4; | |
1270 | buf[i++] = 0x08; | |
1271 | buf[i++] = 0x9d; /* popfq */ | |
1272 | buf[i++] = 0x41; buf[i++] = 0x58; /* pop %r8 */ | |
1273 | buf[i++] = 0x41; buf[i++] = 0x59; /* pop %r9 */ | |
1274 | buf[i++] = 0x41; buf[i++] = 0x5a; /* pop %r10 */ | |
1275 | buf[i++] = 0x41; buf[i++] = 0x5b; /* pop %r11 */ | |
1276 | buf[i++] = 0x41; buf[i++] = 0x5c; /* pop %r12 */ | |
1277 | buf[i++] = 0x41; buf[i++] = 0x5d; /* pop %r13 */ | |
1278 | buf[i++] = 0x41; buf[i++] = 0x5e; /* pop %r14 */ | |
1279 | buf[i++] = 0x41; buf[i++] = 0x5f; /* pop %r15 */ | |
1280 | buf[i++] = 0x58; /* pop %rax */ | |
1281 | buf[i++] = 0x5b; /* pop %rbx */ | |
1282 | buf[i++] = 0x59; /* pop %rcx */ | |
1283 | buf[i++] = 0x5a; /* pop %rdx */ | |
1284 | buf[i++] = 0x5e; /* pop %rsi */ | |
1285 | buf[i++] = 0x5f; /* pop %rdi */ | |
1286 | buf[i++] = 0x5d; /* pop %rbp */ | |
1287 | buf[i++] = 0x5c; /* pop %rsp */ | |
1288 | append_insns (&buildaddr, i, buf); | |
1289 | ||
1290 | /* Now, adjust the original instruction to execute in the jump | |
1291 | pad. */ | |
1292 | *adjusted_insn_addr = buildaddr; | |
1293 | relocate_instruction (&buildaddr, tpaddr); | |
1294 | *adjusted_insn_addr_end = buildaddr; | |
1295 | ||
1296 | /* Finally, write a jump back to the program. */ | |
f4647387 YQ |
1297 | |
1298 | loffset = (tpaddr + orig_size) - (buildaddr + sizeof (jump_insn)); | |
1299 | if (loffset > INT_MAX || loffset < INT_MIN) | |
1300 | { | |
1301 | sprintf (err, | |
1302 | "E.Jump back from jump pad too far from tracepoint " | |
1303 | "(offset 0x%" PRIx64 " > int32).", loffset); | |
1304 | return 1; | |
1305 | } | |
1306 | ||
1307 | offset = (int) loffset; | |
fa593d66 PA |
1308 | memcpy (buf, jump_insn, sizeof (jump_insn)); |
1309 | memcpy (buf + 1, &offset, 4); | |
1310 | append_insns (&buildaddr, sizeof (jump_insn), buf); | |
1311 | ||
1312 | /* The jump pad is now built. Wire in a jump to our jump pad. This | |
1313 | is always done last (by our caller actually), so that we can | |
1314 | install fast tracepoints with threads running. This relies on | |
1315 | the agent's atomic write support. */ | |
f4647387 YQ |
1316 | loffset = *jump_entry - (tpaddr + sizeof (jump_insn)); |
1317 | if (loffset > INT_MAX || loffset < INT_MIN) | |
1318 | { | |
1319 | sprintf (err, | |
1320 | "E.Jump pad too far from tracepoint " | |
1321 | "(offset 0x%" PRIx64 " > int32).", loffset); | |
1322 | return 1; | |
1323 | } | |
1324 | ||
1325 | offset = (int) loffset; | |
1326 | ||
fa593d66 PA |
1327 | memcpy (buf, jump_insn, sizeof (jump_insn)); |
1328 | memcpy (buf + 1, &offset, 4); | |
1329 | memcpy (jjump_pad_insn, buf, sizeof (jump_insn)); | |
1330 | *jjump_pad_insn_size = sizeof (jump_insn); | |
1331 | ||
1332 | /* Return the end address of our pad. */ | |
1333 | *jump_entry = buildaddr; | |
1334 | ||
1335 | return 0; | |
1336 | } | |
1337 | ||
1338 | #endif /* __x86_64__ */ | |
1339 | ||
1340 | /* Build a jump pad that saves registers and calls a collection | |
1341 | function. Writes a jump instruction to the jump pad to | |
1342 | JJUMPAD_INSN. The caller is responsible to write it in at the | |
1343 | tracepoint address. */ | |
1344 | ||
1345 | static int | |
1346 | i386_install_fast_tracepoint_jump_pad (CORE_ADDR tpoint, CORE_ADDR tpaddr, | |
1347 | CORE_ADDR collector, | |
1348 | CORE_ADDR lockaddr, | |
1349 | ULONGEST orig_size, | |
1350 | CORE_ADDR *jump_entry, | |
405f8e94 SS |
1351 | CORE_ADDR *trampoline, |
1352 | ULONGEST *trampoline_size, | |
fa593d66 PA |
1353 | unsigned char *jjump_pad_insn, |
1354 | ULONGEST *jjump_pad_insn_size, | |
1355 | CORE_ADDR *adjusted_insn_addr, | |
405f8e94 SS |
1356 | CORE_ADDR *adjusted_insn_addr_end, |
1357 | char *err) | |
fa593d66 PA |
1358 | { |
1359 | unsigned char buf[0x100]; | |
1360 | int i, offset; | |
1361 | CORE_ADDR buildaddr = *jump_entry; | |
1362 | ||
1363 | /* Build the jump pad. */ | |
1364 | ||
1365 | /* First, do tracepoint data collection. Save registers. */ | |
1366 | i = 0; | |
1367 | buf[i++] = 0x60; /* pushad */ | |
1368 | buf[i++] = 0x68; /* push tpaddr aka $pc */ | |
1369 | *((int *)(buf + i)) = (int) tpaddr; | |
1370 | i += 4; | |
1371 | buf[i++] = 0x9c; /* pushf */ | |
1372 | buf[i++] = 0x1e; /* push %ds */ | |
1373 | buf[i++] = 0x06; /* push %es */ | |
1374 | buf[i++] = 0x0f; /* push %fs */ | |
1375 | buf[i++] = 0xa0; | |
1376 | buf[i++] = 0x0f; /* push %gs */ | |
1377 | buf[i++] = 0xa8; | |
1378 | buf[i++] = 0x16; /* push %ss */ | |
1379 | buf[i++] = 0x0e; /* push %cs */ | |
1380 | append_insns (&buildaddr, i, buf); | |
1381 | ||
1382 | /* Stack space for the collecting_t object. */ | |
1383 | i = 0; | |
1384 | i += push_opcode (&buf[i], "83 ec 08"); /* sub $0x8,%esp */ | |
1385 | ||
1386 | /* Build the object. */ | |
1387 | i += push_opcode (&buf[i], "b8"); /* mov <tpoint>,%eax */ | |
1388 | memcpy (buf + i, &tpoint, 4); | |
1389 | i += 4; | |
1390 | i += push_opcode (&buf[i], "89 04 24"); /* mov %eax,(%esp) */ | |
1391 | ||
1392 | i += push_opcode (&buf[i], "65 a1 00 00 00 00"); /* mov %gs:0x0,%eax */ | |
1393 | i += push_opcode (&buf[i], "89 44 24 04"); /* mov %eax,0x4(%esp) */ | |
1394 | append_insns (&buildaddr, i, buf); | |
1395 | ||
1396 | /* spin-lock. Note this is using cmpxchg, which leaves i386 behind. | |
1397 | If we cared for it, this could be using xchg alternatively. */ | |
1398 | ||
1399 | i = 0; | |
1400 | i += push_opcode (&buf[i], "31 c0"); /* xor %eax,%eax */ | |
1401 | i += push_opcode (&buf[i], "f0 0f b1 25"); /* lock cmpxchg | |
1402 | %esp,<lockaddr> */ | |
1403 | memcpy (&buf[i], (void *) &lockaddr, 4); | |
1404 | i += 4; | |
1405 | i += push_opcode (&buf[i], "85 c0"); /* test %eax,%eax */ | |
1406 | i += push_opcode (&buf[i], "75 f2"); /* jne <again> */ | |
1407 | append_insns (&buildaddr, i, buf); | |
1408 | ||
1409 | ||
1410 | /* Set up arguments to the gdb_collect call. */ | |
1411 | i = 0; | |
1412 | i += push_opcode (&buf[i], "89 e0"); /* mov %esp,%eax */ | |
1413 | i += push_opcode (&buf[i], "83 c0 08"); /* add $0x08,%eax */ | |
1414 | i += push_opcode (&buf[i], "89 44 24 fc"); /* mov %eax,-0x4(%esp) */ | |
1415 | append_insns (&buildaddr, i, buf); | |
1416 | ||
1417 | i = 0; | |
1418 | i += push_opcode (&buf[i], "83 ec 08"); /* sub $0x8,%esp */ | |
1419 | append_insns (&buildaddr, i, buf); | |
1420 | ||
1421 | i = 0; | |
1422 | i += push_opcode (&buf[i], "c7 04 24"); /* movl <addr>,(%esp) */ | |
1423 | memcpy (&buf[i], (void *) &tpoint, 4); | |
1424 | i += 4; | |
1425 | append_insns (&buildaddr, i, buf); | |
1426 | ||
1427 | buf[0] = 0xe8; /* call <reladdr> */ | |
1428 | offset = collector - (buildaddr + sizeof (jump_insn)); | |
1429 | memcpy (buf + 1, &offset, 4); | |
1430 | append_insns (&buildaddr, 5, buf); | |
1431 | /* Clean up after the call. */ | |
1432 | buf[0] = 0x83; /* add $0x8,%esp */ | |
1433 | buf[1] = 0xc4; | |
1434 | buf[2] = 0x08; | |
1435 | append_insns (&buildaddr, 3, buf); | |
1436 | ||
1437 | ||
1438 | /* Clear the spin-lock. This would need the LOCK prefix on older | |
1439 | broken archs. */ | |
1440 | i = 0; | |
1441 | i += push_opcode (&buf[i], "31 c0"); /* xor %eax,%eax */ | |
1442 | i += push_opcode (&buf[i], "a3"); /* mov %eax, lockaddr */ | |
1443 | memcpy (buf + i, &lockaddr, 4); | |
1444 | i += 4; | |
1445 | append_insns (&buildaddr, i, buf); | |
1446 | ||
1447 | ||
1448 | /* Remove stack that had been used for the collect_t object. */ | |
1449 | i = 0; | |
1450 | i += push_opcode (&buf[i], "83 c4 08"); /* add $0x08,%esp */ | |
1451 | append_insns (&buildaddr, i, buf); | |
1452 | ||
1453 | i = 0; | |
1454 | buf[i++] = 0x83; /* add $0x4,%esp (no pop of %cs, assume unchanged) */ | |
1455 | buf[i++] = 0xc4; | |
1456 | buf[i++] = 0x04; | |
1457 | buf[i++] = 0x17; /* pop %ss */ | |
1458 | buf[i++] = 0x0f; /* pop %gs */ | |
1459 | buf[i++] = 0xa9; | |
1460 | buf[i++] = 0x0f; /* pop %fs */ | |
1461 | buf[i++] = 0xa1; | |
1462 | buf[i++] = 0x07; /* pop %es */ | |
405f8e94 | 1463 | buf[i++] = 0x1f; /* pop %ds */ |
fa593d66 PA |
1464 | buf[i++] = 0x9d; /* popf */ |
1465 | buf[i++] = 0x83; /* add $0x4,%esp (pop of tpaddr aka $pc) */ | |
1466 | buf[i++] = 0xc4; | |
1467 | buf[i++] = 0x04; | |
1468 | buf[i++] = 0x61; /* popad */ | |
1469 | append_insns (&buildaddr, i, buf); | |
1470 | ||
1471 | /* Now, adjust the original instruction to execute in the jump | |
1472 | pad. */ | |
1473 | *adjusted_insn_addr = buildaddr; | |
1474 | relocate_instruction (&buildaddr, tpaddr); | |
1475 | *adjusted_insn_addr_end = buildaddr; | |
1476 | ||
1477 | /* Write the jump back to the program. */ | |
1478 | offset = (tpaddr + orig_size) - (buildaddr + sizeof (jump_insn)); | |
1479 | memcpy (buf, jump_insn, sizeof (jump_insn)); | |
1480 | memcpy (buf + 1, &offset, 4); | |
1481 | append_insns (&buildaddr, sizeof (jump_insn), buf); | |
1482 | ||
1483 | /* The jump pad is now built. Wire in a jump to our jump pad. This | |
1484 | is always done last (by our caller actually), so that we can | |
1485 | install fast tracepoints with threads running. This relies on | |
1486 | the agent's atomic write support. */ | |
405f8e94 SS |
1487 | if (orig_size == 4) |
1488 | { | |
1489 | /* Create a trampoline. */ | |
1490 | *trampoline_size = sizeof (jump_insn); | |
1491 | if (!claim_trampoline_space (*trampoline_size, trampoline)) | |
1492 | { | |
1493 | /* No trampoline space available. */ | |
1494 | strcpy (err, | |
1495 | "E.Cannot allocate trampoline space needed for fast " | |
1496 | "tracepoints on 4-byte instructions."); | |
1497 | return 1; | |
1498 | } | |
1499 | ||
1500 | offset = *jump_entry - (*trampoline + sizeof (jump_insn)); | |
1501 | memcpy (buf, jump_insn, sizeof (jump_insn)); | |
1502 | memcpy (buf + 1, &offset, 4); | |
4196ab2a | 1503 | target_write_memory (*trampoline, buf, sizeof (jump_insn)); |
405f8e94 SS |
1504 | |
1505 | /* Use a 16-bit relative jump instruction to jump to the trampoline. */ | |
1506 | offset = (*trampoline - (tpaddr + sizeof (small_jump_insn))) & 0xffff; | |
1507 | memcpy (buf, small_jump_insn, sizeof (small_jump_insn)); | |
1508 | memcpy (buf + 2, &offset, 2); | |
1509 | memcpy (jjump_pad_insn, buf, sizeof (small_jump_insn)); | |
1510 | *jjump_pad_insn_size = sizeof (small_jump_insn); | |
1511 | } | |
1512 | else | |
1513 | { | |
1514 | /* Else use a 32-bit relative jump instruction. */ | |
1515 | offset = *jump_entry - (tpaddr + sizeof (jump_insn)); | |
1516 | memcpy (buf, jump_insn, sizeof (jump_insn)); | |
1517 | memcpy (buf + 1, &offset, 4); | |
1518 | memcpy (jjump_pad_insn, buf, sizeof (jump_insn)); | |
1519 | *jjump_pad_insn_size = sizeof (jump_insn); | |
1520 | } | |
fa593d66 PA |
1521 | |
1522 | /* Return the end address of our pad. */ | |
1523 | *jump_entry = buildaddr; | |
1524 | ||
1525 | return 0; | |
1526 | } | |
1527 | ||
1528 | static int | |
1529 | x86_install_fast_tracepoint_jump_pad (CORE_ADDR tpoint, CORE_ADDR tpaddr, | |
1530 | CORE_ADDR collector, | |
1531 | CORE_ADDR lockaddr, | |
1532 | ULONGEST orig_size, | |
1533 | CORE_ADDR *jump_entry, | |
405f8e94 SS |
1534 | CORE_ADDR *trampoline, |
1535 | ULONGEST *trampoline_size, | |
fa593d66 PA |
1536 | unsigned char *jjump_pad_insn, |
1537 | ULONGEST *jjump_pad_insn_size, | |
1538 | CORE_ADDR *adjusted_insn_addr, | |
405f8e94 SS |
1539 | CORE_ADDR *adjusted_insn_addr_end, |
1540 | char *err) | |
fa593d66 PA |
1541 | { |
1542 | #ifdef __x86_64__ | |
3aee8918 | 1543 | if (is_64bit_tdesc ()) |
fa593d66 PA |
1544 | return amd64_install_fast_tracepoint_jump_pad (tpoint, tpaddr, |
1545 | collector, lockaddr, | |
1546 | orig_size, jump_entry, | |
405f8e94 | 1547 | trampoline, trampoline_size, |
fa593d66 PA |
1548 | jjump_pad_insn, |
1549 | jjump_pad_insn_size, | |
1550 | adjusted_insn_addr, | |
405f8e94 SS |
1551 | adjusted_insn_addr_end, |
1552 | err); | |
fa593d66 PA |
1553 | #endif |
1554 | ||
1555 | return i386_install_fast_tracepoint_jump_pad (tpoint, tpaddr, | |
1556 | collector, lockaddr, | |
1557 | orig_size, jump_entry, | |
405f8e94 | 1558 | trampoline, trampoline_size, |
fa593d66 PA |
1559 | jjump_pad_insn, |
1560 | jjump_pad_insn_size, | |
1561 | adjusted_insn_addr, | |
405f8e94 SS |
1562 | adjusted_insn_addr_end, |
1563 | err); | |
1564 | } | |
1565 | ||
1566 | /* Return the minimum instruction length for fast tracepoints on x86/x86-64 | |
1567 | architectures. */ | |
1568 | ||
1569 | static int | |
1570 | x86_get_min_fast_tracepoint_insn_len (void) | |
1571 | { | |
1572 | static int warned_about_fast_tracepoints = 0; | |
1573 | ||
1574 | #ifdef __x86_64__ | |
1575 | /* On x86-64, 5-byte jump instructions with a 4-byte offset are always | |
1576 | used for fast tracepoints. */ | |
3aee8918 | 1577 | if (is_64bit_tdesc ()) |
405f8e94 SS |
1578 | return 5; |
1579 | #endif | |
1580 | ||
58b4daa5 | 1581 | if (agent_loaded_p ()) |
405f8e94 SS |
1582 | { |
1583 | char errbuf[IPA_BUFSIZ]; | |
1584 | ||
1585 | errbuf[0] = '\0'; | |
1586 | ||
1587 | /* On x86, if trampolines are available, then 4-byte jump instructions | |
1588 | with a 2-byte offset may be used, otherwise 5-byte jump instructions | |
1589 | with a 4-byte offset are used instead. */ | |
1590 | if (have_fast_tracepoint_trampoline_buffer (errbuf)) | |
1591 | return 4; | |
1592 | else | |
1593 | { | |
1594 | /* GDB has no channel to explain to user why a shorter fast | |
1595 | tracepoint is not possible, but at least make GDBserver | |
1596 | mention that something has gone awry. */ | |
1597 | if (!warned_about_fast_tracepoints) | |
1598 | { | |
422186a9 | 1599 | warning ("4-byte fast tracepoints not available; %s", errbuf); |
405f8e94 SS |
1600 | warned_about_fast_tracepoints = 1; |
1601 | } | |
1602 | return 5; | |
1603 | } | |
1604 | } | |
1605 | else | |
1606 | { | |
1607 | /* Indicate that the minimum length is currently unknown since the IPA | |
1608 | has not loaded yet. */ | |
1609 | return 0; | |
1610 | } | |
fa593d66 PA |
1611 | } |
1612 | ||
6a271cae PA |
1613 | static void |
1614 | add_insns (unsigned char *start, int len) | |
1615 | { | |
1616 | CORE_ADDR buildaddr = current_insn_ptr; | |
1617 | ||
1618 | if (debug_threads) | |
87ce2a04 DE |
1619 | debug_printf ("Adding %d bytes of insn at %s\n", |
1620 | len, paddress (buildaddr)); | |
6a271cae PA |
1621 | |
1622 | append_insns (&buildaddr, len, start); | |
1623 | current_insn_ptr = buildaddr; | |
1624 | } | |
1625 | ||
6a271cae PA |
1626 | /* Our general strategy for emitting code is to avoid specifying raw |
1627 | bytes whenever possible, and instead copy a block of inline asm | |
1628 | that is embedded in the function. This is a little messy, because | |
1629 | we need to keep the compiler from discarding what looks like dead | |
1630 | code, plus suppress various warnings. */ | |
1631 | ||
9e4344e5 PA |
1632 | #define EMIT_ASM(NAME, INSNS) \ |
1633 | do \ | |
1634 | { \ | |
1635 | extern unsigned char start_ ## NAME, end_ ## NAME; \ | |
1636 | add_insns (&start_ ## NAME, &end_ ## NAME - &start_ ## NAME); \ | |
493e2a69 | 1637 | __asm__ ("jmp end_" #NAME "\n" \ |
9e4344e5 PA |
1638 | "\t" "start_" #NAME ":" \ |
1639 | "\t" INSNS "\n" \ | |
1640 | "\t" "end_" #NAME ":"); \ | |
1641 | } while (0) | |
6a271cae PA |
1642 | |
1643 | #ifdef __x86_64__ | |
1644 | ||
1645 | #define EMIT_ASM32(NAME,INSNS) \ | |
9e4344e5 PA |
1646 | do \ |
1647 | { \ | |
1648 | extern unsigned char start_ ## NAME, end_ ## NAME; \ | |
1649 | add_insns (&start_ ## NAME, &end_ ## NAME - &start_ ## NAME); \ | |
1650 | __asm__ (".code32\n" \ | |
1651 | "\t" "jmp end_" #NAME "\n" \ | |
1652 | "\t" "start_" #NAME ":\n" \ | |
1653 | "\t" INSNS "\n" \ | |
1654 | "\t" "end_" #NAME ":\n" \ | |
1655 | ".code64\n"); \ | |
1656 | } while (0) | |
6a271cae PA |
1657 | |
1658 | #else | |
1659 | ||
1660 | #define EMIT_ASM32(NAME,INSNS) EMIT_ASM(NAME,INSNS) | |
1661 | ||
1662 | #endif | |
1663 | ||
1664 | #ifdef __x86_64__ | |
1665 | ||
1666 | static void | |
1667 | amd64_emit_prologue (void) | |
1668 | { | |
1669 | EMIT_ASM (amd64_prologue, | |
1670 | "pushq %rbp\n\t" | |
1671 | "movq %rsp,%rbp\n\t" | |
1672 | "sub $0x20,%rsp\n\t" | |
1673 | "movq %rdi,-8(%rbp)\n\t" | |
1674 | "movq %rsi,-16(%rbp)"); | |
1675 | } | |
1676 | ||
1677 | ||
1678 | static void | |
1679 | amd64_emit_epilogue (void) | |
1680 | { | |
1681 | EMIT_ASM (amd64_epilogue, | |
1682 | "movq -16(%rbp),%rdi\n\t" | |
1683 | "movq %rax,(%rdi)\n\t" | |
1684 | "xor %rax,%rax\n\t" | |
1685 | "leave\n\t" | |
1686 | "ret"); | |
1687 | } | |
1688 | ||
1689 | static void | |
1690 | amd64_emit_add (void) | |
1691 | { | |
1692 | EMIT_ASM (amd64_add, | |
1693 | "add (%rsp),%rax\n\t" | |
1694 | "lea 0x8(%rsp),%rsp"); | |
1695 | } | |
1696 | ||
1697 | static void | |
1698 | amd64_emit_sub (void) | |
1699 | { | |
1700 | EMIT_ASM (amd64_sub, | |
1701 | "sub %rax,(%rsp)\n\t" | |
1702 | "pop %rax"); | |
1703 | } | |
1704 | ||
1705 | static void | |
1706 | amd64_emit_mul (void) | |
1707 | { | |
1708 | emit_error = 1; | |
1709 | } | |
1710 | ||
1711 | static void | |
1712 | amd64_emit_lsh (void) | |
1713 | { | |
1714 | emit_error = 1; | |
1715 | } | |
1716 | ||
1717 | static void | |
1718 | amd64_emit_rsh_signed (void) | |
1719 | { | |
1720 | emit_error = 1; | |
1721 | } | |
1722 | ||
1723 | static void | |
1724 | amd64_emit_rsh_unsigned (void) | |
1725 | { | |
1726 | emit_error = 1; | |
1727 | } | |
1728 | ||
1729 | static void | |
1730 | amd64_emit_ext (int arg) | |
1731 | { | |
1732 | switch (arg) | |
1733 | { | |
1734 | case 8: | |
1735 | EMIT_ASM (amd64_ext_8, | |
1736 | "cbtw\n\t" | |
1737 | "cwtl\n\t" | |
1738 | "cltq"); | |
1739 | break; | |
1740 | case 16: | |
1741 | EMIT_ASM (amd64_ext_16, | |
1742 | "cwtl\n\t" | |
1743 | "cltq"); | |
1744 | break; | |
1745 | case 32: | |
1746 | EMIT_ASM (amd64_ext_32, | |
1747 | "cltq"); | |
1748 | break; | |
1749 | default: | |
1750 | emit_error = 1; | |
1751 | } | |
1752 | } | |
1753 | ||
1754 | static void | |
1755 | amd64_emit_log_not (void) | |
1756 | { | |
1757 | EMIT_ASM (amd64_log_not, | |
1758 | "test %rax,%rax\n\t" | |
1759 | "sete %cl\n\t" | |
1760 | "movzbq %cl,%rax"); | |
1761 | } | |
1762 | ||
1763 | static void | |
1764 | amd64_emit_bit_and (void) | |
1765 | { | |
1766 | EMIT_ASM (amd64_and, | |
1767 | "and (%rsp),%rax\n\t" | |
1768 | "lea 0x8(%rsp),%rsp"); | |
1769 | } | |
1770 | ||
1771 | static void | |
1772 | amd64_emit_bit_or (void) | |
1773 | { | |
1774 | EMIT_ASM (amd64_or, | |
1775 | "or (%rsp),%rax\n\t" | |
1776 | "lea 0x8(%rsp),%rsp"); | |
1777 | } | |
1778 | ||
1779 | static void | |
1780 | amd64_emit_bit_xor (void) | |
1781 | { | |
1782 | EMIT_ASM (amd64_xor, | |
1783 | "xor (%rsp),%rax\n\t" | |
1784 | "lea 0x8(%rsp),%rsp"); | |
1785 | } | |
1786 | ||
1787 | static void | |
1788 | amd64_emit_bit_not (void) | |
1789 | { | |
1790 | EMIT_ASM (amd64_bit_not, | |
1791 | "xorq $0xffffffffffffffff,%rax"); | |
1792 | } | |
1793 | ||
1794 | static void | |
1795 | amd64_emit_equal (void) | |
1796 | { | |
1797 | EMIT_ASM (amd64_equal, | |
1798 | "cmp %rax,(%rsp)\n\t" | |
1799 | "je .Lamd64_equal_true\n\t" | |
1800 | "xor %rax,%rax\n\t" | |
1801 | "jmp .Lamd64_equal_end\n\t" | |
1802 | ".Lamd64_equal_true:\n\t" | |
1803 | "mov $0x1,%rax\n\t" | |
1804 | ".Lamd64_equal_end:\n\t" | |
1805 | "lea 0x8(%rsp),%rsp"); | |
1806 | } | |
1807 | ||
1808 | static void | |
1809 | amd64_emit_less_signed (void) | |
1810 | { | |
1811 | EMIT_ASM (amd64_less_signed, | |
1812 | "cmp %rax,(%rsp)\n\t" | |
1813 | "jl .Lamd64_less_signed_true\n\t" | |
1814 | "xor %rax,%rax\n\t" | |
1815 | "jmp .Lamd64_less_signed_end\n\t" | |
1816 | ".Lamd64_less_signed_true:\n\t" | |
1817 | "mov $1,%rax\n\t" | |
1818 | ".Lamd64_less_signed_end:\n\t" | |
1819 | "lea 0x8(%rsp),%rsp"); | |
1820 | } | |
1821 | ||
1822 | static void | |
1823 | amd64_emit_less_unsigned (void) | |
1824 | { | |
1825 | EMIT_ASM (amd64_less_unsigned, | |
1826 | "cmp %rax,(%rsp)\n\t" | |
1827 | "jb .Lamd64_less_unsigned_true\n\t" | |
1828 | "xor %rax,%rax\n\t" | |
1829 | "jmp .Lamd64_less_unsigned_end\n\t" | |
1830 | ".Lamd64_less_unsigned_true:\n\t" | |
1831 | "mov $1,%rax\n\t" | |
1832 | ".Lamd64_less_unsigned_end:\n\t" | |
1833 | "lea 0x8(%rsp),%rsp"); | |
1834 | } | |
1835 | ||
1836 | static void | |
1837 | amd64_emit_ref (int size) | |
1838 | { | |
1839 | switch (size) | |
1840 | { | |
1841 | case 1: | |
1842 | EMIT_ASM (amd64_ref1, | |
1843 | "movb (%rax),%al"); | |
1844 | break; | |
1845 | case 2: | |
1846 | EMIT_ASM (amd64_ref2, | |
1847 | "movw (%rax),%ax"); | |
1848 | break; | |
1849 | case 4: | |
1850 | EMIT_ASM (amd64_ref4, | |
1851 | "movl (%rax),%eax"); | |
1852 | break; | |
1853 | case 8: | |
1854 | EMIT_ASM (amd64_ref8, | |
1855 | "movq (%rax),%rax"); | |
1856 | break; | |
1857 | } | |
1858 | } | |
1859 | ||
1860 | static void | |
1861 | amd64_emit_if_goto (int *offset_p, int *size_p) | |
1862 | { | |
1863 | EMIT_ASM (amd64_if_goto, | |
1864 | "mov %rax,%rcx\n\t" | |
1865 | "pop %rax\n\t" | |
1866 | "cmp $0,%rcx\n\t" | |
1867 | ".byte 0x0f, 0x85, 0x0, 0x0, 0x0, 0x0"); | |
1868 | if (offset_p) | |
1869 | *offset_p = 10; | |
1870 | if (size_p) | |
1871 | *size_p = 4; | |
1872 | } | |
1873 | ||
1874 | static void | |
1875 | amd64_emit_goto (int *offset_p, int *size_p) | |
1876 | { | |
1877 | EMIT_ASM (amd64_goto, | |
1878 | ".byte 0xe9, 0x0, 0x0, 0x0, 0x0"); | |
1879 | if (offset_p) | |
1880 | *offset_p = 1; | |
1881 | if (size_p) | |
1882 | *size_p = 4; | |
1883 | } | |
1884 | ||
1885 | static void | |
1886 | amd64_write_goto_address (CORE_ADDR from, CORE_ADDR to, int size) | |
1887 | { | |
1888 | int diff = (to - (from + size)); | |
1889 | unsigned char buf[sizeof (int)]; | |
1890 | ||
1891 | if (size != 4) | |
1892 | { | |
1893 | emit_error = 1; | |
1894 | return; | |
1895 | } | |
1896 | ||
1897 | memcpy (buf, &diff, sizeof (int)); | |
4196ab2a | 1898 | target_write_memory (from, buf, sizeof (int)); |
6a271cae PA |
1899 | } |
1900 | ||
1901 | static void | |
4e29fb54 | 1902 | amd64_emit_const (LONGEST num) |
6a271cae PA |
1903 | { |
1904 | unsigned char buf[16]; | |
1905 | int i; | |
1906 | CORE_ADDR buildaddr = current_insn_ptr; | |
1907 | ||
1908 | i = 0; | |
1909 | buf[i++] = 0x48; buf[i++] = 0xb8; /* mov $<n>,%rax */ | |
b00ad6ff | 1910 | memcpy (&buf[i], &num, sizeof (num)); |
6a271cae PA |
1911 | i += 8; |
1912 | append_insns (&buildaddr, i, buf); | |
1913 | current_insn_ptr = buildaddr; | |
1914 | } | |
1915 | ||
1916 | static void | |
1917 | amd64_emit_call (CORE_ADDR fn) | |
1918 | { | |
1919 | unsigned char buf[16]; | |
1920 | int i; | |
1921 | CORE_ADDR buildaddr; | |
4e29fb54 | 1922 | LONGEST offset64; |
6a271cae PA |
1923 | |
1924 | /* The destination function being in the shared library, may be | |
1925 | >31-bits away off the compiled code pad. */ | |
1926 | ||
1927 | buildaddr = current_insn_ptr; | |
1928 | ||
1929 | offset64 = fn - (buildaddr + 1 /* call op */ + 4 /* 32-bit offset */); | |
1930 | ||
1931 | i = 0; | |
1932 | ||
1933 | if (offset64 > INT_MAX || offset64 < INT_MIN) | |
1934 | { | |
1935 | /* Offset is too large for a call. Use callq, but that requires | |
1936 | a register, so avoid it if possible. Use r10, since it is | |
1937 | call-clobbered, we don't have to push/pop it. */ | |
1938 | buf[i++] = 0x48; /* mov $fn,%r10 */ | |
1939 | buf[i++] = 0xba; | |
1940 | memcpy (buf + i, &fn, 8); | |
1941 | i += 8; | |
1942 | buf[i++] = 0xff; /* callq *%r10 */ | |
1943 | buf[i++] = 0xd2; | |
1944 | } | |
1945 | else | |
1946 | { | |
1947 | int offset32 = offset64; /* we know we can't overflow here. */ | |
ed036b40 PA |
1948 | |
1949 | buf[i++] = 0xe8; /* call <reladdr> */ | |
6a271cae PA |
1950 | memcpy (buf + i, &offset32, 4); |
1951 | i += 4; | |
1952 | } | |
1953 | ||
1954 | append_insns (&buildaddr, i, buf); | |
1955 | current_insn_ptr = buildaddr; | |
1956 | } | |
1957 | ||
1958 | static void | |
1959 | amd64_emit_reg (int reg) | |
1960 | { | |
1961 | unsigned char buf[16]; | |
1962 | int i; | |
1963 | CORE_ADDR buildaddr; | |
1964 | ||
1965 | /* Assume raw_regs is still in %rdi. */ | |
1966 | buildaddr = current_insn_ptr; | |
1967 | i = 0; | |
1968 | buf[i++] = 0xbe; /* mov $<n>,%esi */ | |
b00ad6ff | 1969 | memcpy (&buf[i], ®, sizeof (reg)); |
6a271cae PA |
1970 | i += 4; |
1971 | append_insns (&buildaddr, i, buf); | |
1972 | current_insn_ptr = buildaddr; | |
1973 | amd64_emit_call (get_raw_reg_func_addr ()); | |
1974 | } | |
1975 | ||
1976 | static void | |
1977 | amd64_emit_pop (void) | |
1978 | { | |
1979 | EMIT_ASM (amd64_pop, | |
1980 | "pop %rax"); | |
1981 | } | |
1982 | ||
1983 | static void | |
1984 | amd64_emit_stack_flush (void) | |
1985 | { | |
1986 | EMIT_ASM (amd64_stack_flush, | |
1987 | "push %rax"); | |
1988 | } | |
1989 | ||
1990 | static void | |
1991 | amd64_emit_zero_ext (int arg) | |
1992 | { | |
1993 | switch (arg) | |
1994 | { | |
1995 | case 8: | |
1996 | EMIT_ASM (amd64_zero_ext_8, | |
1997 | "and $0xff,%rax"); | |
1998 | break; | |
1999 | case 16: | |
2000 | EMIT_ASM (amd64_zero_ext_16, | |
2001 | "and $0xffff,%rax"); | |
2002 | break; | |
2003 | case 32: | |
2004 | EMIT_ASM (amd64_zero_ext_32, | |
2005 | "mov $0xffffffff,%rcx\n\t" | |
2006 | "and %rcx,%rax"); | |
2007 | break; | |
2008 | default: | |
2009 | emit_error = 1; | |
2010 | } | |
2011 | } | |
2012 | ||
2013 | static void | |
2014 | amd64_emit_swap (void) | |
2015 | { | |
2016 | EMIT_ASM (amd64_swap, | |
2017 | "mov %rax,%rcx\n\t" | |
2018 | "pop %rax\n\t" | |
2019 | "push %rcx"); | |
2020 | } | |
2021 | ||
2022 | static void | |
2023 | amd64_emit_stack_adjust (int n) | |
2024 | { | |
2025 | unsigned char buf[16]; | |
2026 | int i; | |
2027 | CORE_ADDR buildaddr = current_insn_ptr; | |
2028 | ||
2029 | i = 0; | |
2030 | buf[i++] = 0x48; /* lea $<n>(%rsp),%rsp */ | |
2031 | buf[i++] = 0x8d; | |
2032 | buf[i++] = 0x64; | |
2033 | buf[i++] = 0x24; | |
2034 | /* This only handles adjustments up to 16, but we don't expect any more. */ | |
2035 | buf[i++] = n * 8; | |
2036 | append_insns (&buildaddr, i, buf); | |
2037 | current_insn_ptr = buildaddr; | |
2038 | } | |
2039 | ||
2040 | /* FN's prototype is `LONGEST(*fn)(int)'. */ | |
2041 | ||
2042 | static void | |
2043 | amd64_emit_int_call_1 (CORE_ADDR fn, int arg1) | |
2044 | { | |
2045 | unsigned char buf[16]; | |
2046 | int i; | |
2047 | CORE_ADDR buildaddr; | |
2048 | ||
2049 | buildaddr = current_insn_ptr; | |
2050 | i = 0; | |
2051 | buf[i++] = 0xbf; /* movl $<n>,%edi */ | |
b00ad6ff | 2052 | memcpy (&buf[i], &arg1, sizeof (arg1)); |
6a271cae PA |
2053 | i += 4; |
2054 | append_insns (&buildaddr, i, buf); | |
2055 | current_insn_ptr = buildaddr; | |
2056 | amd64_emit_call (fn); | |
2057 | } | |
2058 | ||
4e29fb54 | 2059 | /* FN's prototype is `void(*fn)(int,LONGEST)'. */ |
6a271cae PA |
2060 | |
2061 | static void | |
2062 | amd64_emit_void_call_2 (CORE_ADDR fn, int arg1) | |
2063 | { | |
2064 | unsigned char buf[16]; | |
2065 | int i; | |
2066 | CORE_ADDR buildaddr; | |
2067 | ||
2068 | buildaddr = current_insn_ptr; | |
2069 | i = 0; | |
2070 | buf[i++] = 0xbf; /* movl $<n>,%edi */ | |
b00ad6ff | 2071 | memcpy (&buf[i], &arg1, sizeof (arg1)); |
6a271cae PA |
2072 | i += 4; |
2073 | append_insns (&buildaddr, i, buf); | |
2074 | current_insn_ptr = buildaddr; | |
2075 | EMIT_ASM (amd64_void_call_2_a, | |
2076 | /* Save away a copy of the stack top. */ | |
2077 | "push %rax\n\t" | |
2078 | /* Also pass top as the second argument. */ | |
2079 | "mov %rax,%rsi"); | |
2080 | amd64_emit_call (fn); | |
2081 | EMIT_ASM (amd64_void_call_2_b, | |
2082 | /* Restore the stack top, %rax may have been trashed. */ | |
2083 | "pop %rax"); | |
2084 | } | |
2085 | ||
df4a0200 | 2086 | static void |
6b9801d4 SS |
2087 | amd64_emit_eq_goto (int *offset_p, int *size_p) |
2088 | { | |
2089 | EMIT_ASM (amd64_eq, | |
2090 | "cmp %rax,(%rsp)\n\t" | |
2091 | "jne .Lamd64_eq_fallthru\n\t" | |
2092 | "lea 0x8(%rsp),%rsp\n\t" | |
2093 | "pop %rax\n\t" | |
2094 | /* jmp, but don't trust the assembler to choose the right jump */ | |
2095 | ".byte 0xe9, 0x0, 0x0, 0x0, 0x0\n\t" | |
2096 | ".Lamd64_eq_fallthru:\n\t" | |
2097 | "lea 0x8(%rsp),%rsp\n\t" | |
2098 | "pop %rax"); | |
2099 | ||
2100 | if (offset_p) | |
2101 | *offset_p = 13; | |
2102 | if (size_p) | |
2103 | *size_p = 4; | |
2104 | } | |
2105 | ||
df4a0200 | 2106 | static void |
6b9801d4 SS |
2107 | amd64_emit_ne_goto (int *offset_p, int *size_p) |
2108 | { | |
2109 | EMIT_ASM (amd64_ne, | |
2110 | "cmp %rax,(%rsp)\n\t" | |
2111 | "je .Lamd64_ne_fallthru\n\t" | |
2112 | "lea 0x8(%rsp),%rsp\n\t" | |
2113 | "pop %rax\n\t" | |
2114 | /* jmp, but don't trust the assembler to choose the right jump */ | |
2115 | ".byte 0xe9, 0x0, 0x0, 0x0, 0x0\n\t" | |
2116 | ".Lamd64_ne_fallthru:\n\t" | |
2117 | "lea 0x8(%rsp),%rsp\n\t" | |
2118 | "pop %rax"); | |
2119 | ||
2120 | if (offset_p) | |
2121 | *offset_p = 13; | |
2122 | if (size_p) | |
2123 | *size_p = 4; | |
2124 | } | |
2125 | ||
df4a0200 | 2126 | static void |
6b9801d4 SS |
2127 | amd64_emit_lt_goto (int *offset_p, int *size_p) |
2128 | { | |
2129 | EMIT_ASM (amd64_lt, | |
2130 | "cmp %rax,(%rsp)\n\t" | |
2131 | "jnl .Lamd64_lt_fallthru\n\t" | |
2132 | "lea 0x8(%rsp),%rsp\n\t" | |
2133 | "pop %rax\n\t" | |
2134 | /* jmp, but don't trust the assembler to choose the right jump */ | |
2135 | ".byte 0xe9, 0x0, 0x0, 0x0, 0x0\n\t" | |
2136 | ".Lamd64_lt_fallthru:\n\t" | |
2137 | "lea 0x8(%rsp),%rsp\n\t" | |
2138 | "pop %rax"); | |
2139 | ||
2140 | if (offset_p) | |
2141 | *offset_p = 13; | |
2142 | if (size_p) | |
2143 | *size_p = 4; | |
2144 | } | |
2145 | ||
df4a0200 | 2146 | static void |
6b9801d4 SS |
2147 | amd64_emit_le_goto (int *offset_p, int *size_p) |
2148 | { | |
2149 | EMIT_ASM (amd64_le, | |
2150 | "cmp %rax,(%rsp)\n\t" | |
2151 | "jnle .Lamd64_le_fallthru\n\t" | |
2152 | "lea 0x8(%rsp),%rsp\n\t" | |
2153 | "pop %rax\n\t" | |
2154 | /* jmp, but don't trust the assembler to choose the right jump */ | |
2155 | ".byte 0xe9, 0x0, 0x0, 0x0, 0x0\n\t" | |
2156 | ".Lamd64_le_fallthru:\n\t" | |
2157 | "lea 0x8(%rsp),%rsp\n\t" | |
2158 | "pop %rax"); | |
2159 | ||
2160 | if (offset_p) | |
2161 | *offset_p = 13; | |
2162 | if (size_p) | |
2163 | *size_p = 4; | |
2164 | } | |
2165 | ||
df4a0200 | 2166 | static void |
6b9801d4 SS |
2167 | amd64_emit_gt_goto (int *offset_p, int *size_p) |
2168 | { | |
2169 | EMIT_ASM (amd64_gt, | |
2170 | "cmp %rax,(%rsp)\n\t" | |
2171 | "jng .Lamd64_gt_fallthru\n\t" | |
2172 | "lea 0x8(%rsp),%rsp\n\t" | |
2173 | "pop %rax\n\t" | |
2174 | /* jmp, but don't trust the assembler to choose the right jump */ | |
2175 | ".byte 0xe9, 0x0, 0x0, 0x0, 0x0\n\t" | |
2176 | ".Lamd64_gt_fallthru:\n\t" | |
2177 | "lea 0x8(%rsp),%rsp\n\t" | |
2178 | "pop %rax"); | |
2179 | ||
2180 | if (offset_p) | |
2181 | *offset_p = 13; | |
2182 | if (size_p) | |
2183 | *size_p = 4; | |
2184 | } | |
2185 | ||
df4a0200 | 2186 | static void |
6b9801d4 SS |
2187 | amd64_emit_ge_goto (int *offset_p, int *size_p) |
2188 | { | |
2189 | EMIT_ASM (amd64_ge, | |
2190 | "cmp %rax,(%rsp)\n\t" | |
2191 | "jnge .Lamd64_ge_fallthru\n\t" | |
2192 | ".Lamd64_ge_jump:\n\t" | |
2193 | "lea 0x8(%rsp),%rsp\n\t" | |
2194 | "pop %rax\n\t" | |
2195 | /* jmp, but don't trust the assembler to choose the right jump */ | |
2196 | ".byte 0xe9, 0x0, 0x0, 0x0, 0x0\n\t" | |
2197 | ".Lamd64_ge_fallthru:\n\t" | |
2198 | "lea 0x8(%rsp),%rsp\n\t" | |
2199 | "pop %rax"); | |
2200 | ||
2201 | if (offset_p) | |
2202 | *offset_p = 13; | |
2203 | if (size_p) | |
2204 | *size_p = 4; | |
2205 | } | |
2206 | ||
6a271cae PA |
2207 | struct emit_ops amd64_emit_ops = |
2208 | { | |
2209 | amd64_emit_prologue, | |
2210 | amd64_emit_epilogue, | |
2211 | amd64_emit_add, | |
2212 | amd64_emit_sub, | |
2213 | amd64_emit_mul, | |
2214 | amd64_emit_lsh, | |
2215 | amd64_emit_rsh_signed, | |
2216 | amd64_emit_rsh_unsigned, | |
2217 | amd64_emit_ext, | |
2218 | amd64_emit_log_not, | |
2219 | amd64_emit_bit_and, | |
2220 | amd64_emit_bit_or, | |
2221 | amd64_emit_bit_xor, | |
2222 | amd64_emit_bit_not, | |
2223 | amd64_emit_equal, | |
2224 | amd64_emit_less_signed, | |
2225 | amd64_emit_less_unsigned, | |
2226 | amd64_emit_ref, | |
2227 | amd64_emit_if_goto, | |
2228 | amd64_emit_goto, | |
2229 | amd64_write_goto_address, | |
2230 | amd64_emit_const, | |
2231 | amd64_emit_call, | |
2232 | amd64_emit_reg, | |
2233 | amd64_emit_pop, | |
2234 | amd64_emit_stack_flush, | |
2235 | amd64_emit_zero_ext, | |
2236 | amd64_emit_swap, | |
2237 | amd64_emit_stack_adjust, | |
2238 | amd64_emit_int_call_1, | |
6b9801d4 SS |
2239 | amd64_emit_void_call_2, |
2240 | amd64_emit_eq_goto, | |
2241 | amd64_emit_ne_goto, | |
2242 | amd64_emit_lt_goto, | |
2243 | amd64_emit_le_goto, | |
2244 | amd64_emit_gt_goto, | |
2245 | amd64_emit_ge_goto | |
6a271cae PA |
2246 | }; |
2247 | ||
2248 | #endif /* __x86_64__ */ | |
2249 | ||
2250 | static void | |
2251 | i386_emit_prologue (void) | |
2252 | { | |
2253 | EMIT_ASM32 (i386_prologue, | |
2254 | "push %ebp\n\t" | |
bf15cbda SS |
2255 | "mov %esp,%ebp\n\t" |
2256 | "push %ebx"); | |
6a271cae PA |
2257 | /* At this point, the raw regs base address is at 8(%ebp), and the |
2258 | value pointer is at 12(%ebp). */ | |
2259 | } | |
2260 | ||
2261 | static void | |
2262 | i386_emit_epilogue (void) | |
2263 | { | |
2264 | EMIT_ASM32 (i386_epilogue, | |
2265 | "mov 12(%ebp),%ecx\n\t" | |
2266 | "mov %eax,(%ecx)\n\t" | |
2267 | "mov %ebx,0x4(%ecx)\n\t" | |
2268 | "xor %eax,%eax\n\t" | |
bf15cbda | 2269 | "pop %ebx\n\t" |
6a271cae PA |
2270 | "pop %ebp\n\t" |
2271 | "ret"); | |
2272 | } | |
2273 | ||
2274 | static void | |
2275 | i386_emit_add (void) | |
2276 | { | |
2277 | EMIT_ASM32 (i386_add, | |
2278 | "add (%esp),%eax\n\t" | |
2279 | "adc 0x4(%esp),%ebx\n\t" | |
2280 | "lea 0x8(%esp),%esp"); | |
2281 | } | |
2282 | ||
2283 | static void | |
2284 | i386_emit_sub (void) | |
2285 | { | |
2286 | EMIT_ASM32 (i386_sub, | |
2287 | "subl %eax,(%esp)\n\t" | |
2288 | "sbbl %ebx,4(%esp)\n\t" | |
2289 | "pop %eax\n\t" | |
2290 | "pop %ebx\n\t"); | |
2291 | } | |
2292 | ||
2293 | static void | |
2294 | i386_emit_mul (void) | |
2295 | { | |
2296 | emit_error = 1; | |
2297 | } | |
2298 | ||
2299 | static void | |
2300 | i386_emit_lsh (void) | |
2301 | { | |
2302 | emit_error = 1; | |
2303 | } | |
2304 | ||
2305 | static void | |
2306 | i386_emit_rsh_signed (void) | |
2307 | { | |
2308 | emit_error = 1; | |
2309 | } | |
2310 | ||
2311 | static void | |
2312 | i386_emit_rsh_unsigned (void) | |
2313 | { | |
2314 | emit_error = 1; | |
2315 | } | |
2316 | ||
2317 | static void | |
2318 | i386_emit_ext (int arg) | |
2319 | { | |
2320 | switch (arg) | |
2321 | { | |
2322 | case 8: | |
2323 | EMIT_ASM32 (i386_ext_8, | |
2324 | "cbtw\n\t" | |
2325 | "cwtl\n\t" | |
2326 | "movl %eax,%ebx\n\t" | |
2327 | "sarl $31,%ebx"); | |
2328 | break; | |
2329 | case 16: | |
2330 | EMIT_ASM32 (i386_ext_16, | |
2331 | "cwtl\n\t" | |
2332 | "movl %eax,%ebx\n\t" | |
2333 | "sarl $31,%ebx"); | |
2334 | break; | |
2335 | case 32: | |
2336 | EMIT_ASM32 (i386_ext_32, | |
2337 | "movl %eax,%ebx\n\t" | |
2338 | "sarl $31,%ebx"); | |
2339 | break; | |
2340 | default: | |
2341 | emit_error = 1; | |
2342 | } | |
2343 | } | |
2344 | ||
2345 | static void | |
2346 | i386_emit_log_not (void) | |
2347 | { | |
2348 | EMIT_ASM32 (i386_log_not, | |
2349 | "or %ebx,%eax\n\t" | |
2350 | "test %eax,%eax\n\t" | |
2351 | "sete %cl\n\t" | |
2352 | "xor %ebx,%ebx\n\t" | |
2353 | "movzbl %cl,%eax"); | |
2354 | } | |
2355 | ||
2356 | static void | |
2357 | i386_emit_bit_and (void) | |
2358 | { | |
2359 | EMIT_ASM32 (i386_and, | |
2360 | "and (%esp),%eax\n\t" | |
2361 | "and 0x4(%esp),%ebx\n\t" | |
2362 | "lea 0x8(%esp),%esp"); | |
2363 | } | |
2364 | ||
2365 | static void | |
2366 | i386_emit_bit_or (void) | |
2367 | { | |
2368 | EMIT_ASM32 (i386_or, | |
2369 | "or (%esp),%eax\n\t" | |
2370 | "or 0x4(%esp),%ebx\n\t" | |
2371 | "lea 0x8(%esp),%esp"); | |
2372 | } | |
2373 | ||
2374 | static void | |
2375 | i386_emit_bit_xor (void) | |
2376 | { | |
2377 | EMIT_ASM32 (i386_xor, | |
2378 | "xor (%esp),%eax\n\t" | |
2379 | "xor 0x4(%esp),%ebx\n\t" | |
2380 | "lea 0x8(%esp),%esp"); | |
2381 | } | |
2382 | ||
2383 | static void | |
2384 | i386_emit_bit_not (void) | |
2385 | { | |
2386 | EMIT_ASM32 (i386_bit_not, | |
2387 | "xor $0xffffffff,%eax\n\t" | |
2388 | "xor $0xffffffff,%ebx\n\t"); | |
2389 | } | |
2390 | ||
2391 | static void | |
2392 | i386_emit_equal (void) | |
2393 | { | |
2394 | EMIT_ASM32 (i386_equal, | |
2395 | "cmpl %ebx,4(%esp)\n\t" | |
2396 | "jne .Li386_equal_false\n\t" | |
2397 | "cmpl %eax,(%esp)\n\t" | |
2398 | "je .Li386_equal_true\n\t" | |
2399 | ".Li386_equal_false:\n\t" | |
2400 | "xor %eax,%eax\n\t" | |
2401 | "jmp .Li386_equal_end\n\t" | |
2402 | ".Li386_equal_true:\n\t" | |
2403 | "mov $1,%eax\n\t" | |
2404 | ".Li386_equal_end:\n\t" | |
2405 | "xor %ebx,%ebx\n\t" | |
2406 | "lea 0x8(%esp),%esp"); | |
2407 | } | |
2408 | ||
2409 | static void | |
2410 | i386_emit_less_signed (void) | |
2411 | { | |
2412 | EMIT_ASM32 (i386_less_signed, | |
2413 | "cmpl %ebx,4(%esp)\n\t" | |
2414 | "jl .Li386_less_signed_true\n\t" | |
2415 | "jne .Li386_less_signed_false\n\t" | |
2416 | "cmpl %eax,(%esp)\n\t" | |
2417 | "jl .Li386_less_signed_true\n\t" | |
2418 | ".Li386_less_signed_false:\n\t" | |
2419 | "xor %eax,%eax\n\t" | |
2420 | "jmp .Li386_less_signed_end\n\t" | |
2421 | ".Li386_less_signed_true:\n\t" | |
2422 | "mov $1,%eax\n\t" | |
2423 | ".Li386_less_signed_end:\n\t" | |
2424 | "xor %ebx,%ebx\n\t" | |
2425 | "lea 0x8(%esp),%esp"); | |
2426 | } | |
2427 | ||
2428 | static void | |
2429 | i386_emit_less_unsigned (void) | |
2430 | { | |
2431 | EMIT_ASM32 (i386_less_unsigned, | |
2432 | "cmpl %ebx,4(%esp)\n\t" | |
2433 | "jb .Li386_less_unsigned_true\n\t" | |
2434 | "jne .Li386_less_unsigned_false\n\t" | |
2435 | "cmpl %eax,(%esp)\n\t" | |
2436 | "jb .Li386_less_unsigned_true\n\t" | |
2437 | ".Li386_less_unsigned_false:\n\t" | |
2438 | "xor %eax,%eax\n\t" | |
2439 | "jmp .Li386_less_unsigned_end\n\t" | |
2440 | ".Li386_less_unsigned_true:\n\t" | |
2441 | "mov $1,%eax\n\t" | |
2442 | ".Li386_less_unsigned_end:\n\t" | |
2443 | "xor %ebx,%ebx\n\t" | |
2444 | "lea 0x8(%esp),%esp"); | |
2445 | } | |
2446 | ||
2447 | static void | |
2448 | i386_emit_ref (int size) | |
2449 | { | |
2450 | switch (size) | |
2451 | { | |
2452 | case 1: | |
2453 | EMIT_ASM32 (i386_ref1, | |
2454 | "movb (%eax),%al"); | |
2455 | break; | |
2456 | case 2: | |
2457 | EMIT_ASM32 (i386_ref2, | |
2458 | "movw (%eax),%ax"); | |
2459 | break; | |
2460 | case 4: | |
2461 | EMIT_ASM32 (i386_ref4, | |
2462 | "movl (%eax),%eax"); | |
2463 | break; | |
2464 | case 8: | |
2465 | EMIT_ASM32 (i386_ref8, | |
2466 | "movl 4(%eax),%ebx\n\t" | |
2467 | "movl (%eax),%eax"); | |
2468 | break; | |
2469 | } | |
2470 | } | |
2471 | ||
2472 | static void | |
2473 | i386_emit_if_goto (int *offset_p, int *size_p) | |
2474 | { | |
2475 | EMIT_ASM32 (i386_if_goto, | |
2476 | "mov %eax,%ecx\n\t" | |
2477 | "or %ebx,%ecx\n\t" | |
2478 | "pop %eax\n\t" | |
2479 | "pop %ebx\n\t" | |
2480 | "cmpl $0,%ecx\n\t" | |
2481 | /* Don't trust the assembler to choose the right jump */ | |
2482 | ".byte 0x0f, 0x85, 0x0, 0x0, 0x0, 0x0"); | |
2483 | ||
2484 | if (offset_p) | |
2485 | *offset_p = 11; /* be sure that this matches the sequence above */ | |
2486 | if (size_p) | |
2487 | *size_p = 4; | |
2488 | } | |
2489 | ||
2490 | static void | |
2491 | i386_emit_goto (int *offset_p, int *size_p) | |
2492 | { | |
2493 | EMIT_ASM32 (i386_goto, | |
2494 | /* Don't trust the assembler to choose the right jump */ | |
2495 | ".byte 0xe9, 0x0, 0x0, 0x0, 0x0"); | |
2496 | if (offset_p) | |
2497 | *offset_p = 1; | |
2498 | if (size_p) | |
2499 | *size_p = 4; | |
2500 | } | |
2501 | ||
2502 | static void | |
2503 | i386_write_goto_address (CORE_ADDR from, CORE_ADDR to, int size) | |
2504 | { | |
2505 | int diff = (to - (from + size)); | |
2506 | unsigned char buf[sizeof (int)]; | |
2507 | ||
2508 | /* We're only doing 4-byte sizes at the moment. */ | |
2509 | if (size != 4) | |
2510 | { | |
2511 | emit_error = 1; | |
2512 | return; | |
2513 | } | |
2514 | ||
2515 | memcpy (buf, &diff, sizeof (int)); | |
4196ab2a | 2516 | target_write_memory (from, buf, sizeof (int)); |
6a271cae PA |
2517 | } |
2518 | ||
2519 | static void | |
4e29fb54 | 2520 | i386_emit_const (LONGEST num) |
6a271cae PA |
2521 | { |
2522 | unsigned char buf[16]; | |
b00ad6ff | 2523 | int i, hi, lo; |
6a271cae PA |
2524 | CORE_ADDR buildaddr = current_insn_ptr; |
2525 | ||
2526 | i = 0; | |
2527 | buf[i++] = 0xb8; /* mov $<n>,%eax */ | |
b00ad6ff NF |
2528 | lo = num & 0xffffffff; |
2529 | memcpy (&buf[i], &lo, sizeof (lo)); | |
6a271cae PA |
2530 | i += 4; |
2531 | hi = ((num >> 32) & 0xffffffff); | |
2532 | if (hi) | |
2533 | { | |
2534 | buf[i++] = 0xbb; /* mov $<n>,%ebx */ | |
b00ad6ff | 2535 | memcpy (&buf[i], &hi, sizeof (hi)); |
6a271cae PA |
2536 | i += 4; |
2537 | } | |
2538 | else | |
2539 | { | |
2540 | buf[i++] = 0x31; buf[i++] = 0xdb; /* xor %ebx,%ebx */ | |
2541 | } | |
2542 | append_insns (&buildaddr, i, buf); | |
2543 | current_insn_ptr = buildaddr; | |
2544 | } | |
2545 | ||
2546 | static void | |
2547 | i386_emit_call (CORE_ADDR fn) | |
2548 | { | |
2549 | unsigned char buf[16]; | |
2550 | int i, offset; | |
2551 | CORE_ADDR buildaddr; | |
2552 | ||
2553 | buildaddr = current_insn_ptr; | |
2554 | i = 0; | |
2555 | buf[i++] = 0xe8; /* call <reladdr> */ | |
2556 | offset = ((int) fn) - (buildaddr + 5); | |
2557 | memcpy (buf + 1, &offset, 4); | |
2558 | append_insns (&buildaddr, 5, buf); | |
2559 | current_insn_ptr = buildaddr; | |
2560 | } | |
2561 | ||
2562 | static void | |
2563 | i386_emit_reg (int reg) | |
2564 | { | |
2565 | unsigned char buf[16]; | |
2566 | int i; | |
2567 | CORE_ADDR buildaddr; | |
2568 | ||
2569 | EMIT_ASM32 (i386_reg_a, | |
2570 | "sub $0x8,%esp"); | |
2571 | buildaddr = current_insn_ptr; | |
2572 | i = 0; | |
2573 | buf[i++] = 0xb8; /* mov $<n>,%eax */ | |
b00ad6ff | 2574 | memcpy (&buf[i], ®, sizeof (reg)); |
6a271cae PA |
2575 | i += 4; |
2576 | append_insns (&buildaddr, i, buf); | |
2577 | current_insn_ptr = buildaddr; | |
2578 | EMIT_ASM32 (i386_reg_b, | |
2579 | "mov %eax,4(%esp)\n\t" | |
2580 | "mov 8(%ebp),%eax\n\t" | |
2581 | "mov %eax,(%esp)"); | |
2582 | i386_emit_call (get_raw_reg_func_addr ()); | |
2583 | EMIT_ASM32 (i386_reg_c, | |
2584 | "xor %ebx,%ebx\n\t" | |
2585 | "lea 0x8(%esp),%esp"); | |
2586 | } | |
2587 | ||
2588 | static void | |
2589 | i386_emit_pop (void) | |
2590 | { | |
2591 | EMIT_ASM32 (i386_pop, | |
2592 | "pop %eax\n\t" | |
2593 | "pop %ebx"); | |
2594 | } | |
2595 | ||
2596 | static void | |
2597 | i386_emit_stack_flush (void) | |
2598 | { | |
2599 | EMIT_ASM32 (i386_stack_flush, | |
2600 | "push %ebx\n\t" | |
2601 | "push %eax"); | |
2602 | } | |
2603 | ||
2604 | static void | |
2605 | i386_emit_zero_ext (int arg) | |
2606 | { | |
2607 | switch (arg) | |
2608 | { | |
2609 | case 8: | |
2610 | EMIT_ASM32 (i386_zero_ext_8, | |
2611 | "and $0xff,%eax\n\t" | |
2612 | "xor %ebx,%ebx"); | |
2613 | break; | |
2614 | case 16: | |
2615 | EMIT_ASM32 (i386_zero_ext_16, | |
2616 | "and $0xffff,%eax\n\t" | |
2617 | "xor %ebx,%ebx"); | |
2618 | break; | |
2619 | case 32: | |
2620 | EMIT_ASM32 (i386_zero_ext_32, | |
2621 | "xor %ebx,%ebx"); | |
2622 | break; | |
2623 | default: | |
2624 | emit_error = 1; | |
2625 | } | |
2626 | } | |
2627 | ||
2628 | static void | |
2629 | i386_emit_swap (void) | |
2630 | { | |
2631 | EMIT_ASM32 (i386_swap, | |
2632 | "mov %eax,%ecx\n\t" | |
2633 | "mov %ebx,%edx\n\t" | |
2634 | "pop %eax\n\t" | |
2635 | "pop %ebx\n\t" | |
2636 | "push %edx\n\t" | |
2637 | "push %ecx"); | |
2638 | } | |
2639 | ||
2640 | static void | |
2641 | i386_emit_stack_adjust (int n) | |
2642 | { | |
2643 | unsigned char buf[16]; | |
2644 | int i; | |
2645 | CORE_ADDR buildaddr = current_insn_ptr; | |
2646 | ||
2647 | i = 0; | |
2648 | buf[i++] = 0x8d; /* lea $<n>(%esp),%esp */ | |
2649 | buf[i++] = 0x64; | |
2650 | buf[i++] = 0x24; | |
2651 | buf[i++] = n * 8; | |
2652 | append_insns (&buildaddr, i, buf); | |
2653 | current_insn_ptr = buildaddr; | |
2654 | } | |
2655 | ||
2656 | /* FN's prototype is `LONGEST(*fn)(int)'. */ | |
2657 | ||
2658 | static void | |
2659 | i386_emit_int_call_1 (CORE_ADDR fn, int arg1) | |
2660 | { | |
2661 | unsigned char buf[16]; | |
2662 | int i; | |
2663 | CORE_ADDR buildaddr; | |
2664 | ||
2665 | EMIT_ASM32 (i386_int_call_1_a, | |
2666 | /* Reserve a bit of stack space. */ | |
2667 | "sub $0x8,%esp"); | |
2668 | /* Put the one argument on the stack. */ | |
2669 | buildaddr = current_insn_ptr; | |
2670 | i = 0; | |
2671 | buf[i++] = 0xc7; /* movl $<arg1>,(%esp) */ | |
2672 | buf[i++] = 0x04; | |
2673 | buf[i++] = 0x24; | |
b00ad6ff | 2674 | memcpy (&buf[i], &arg1, sizeof (arg1)); |
6a271cae PA |
2675 | i += 4; |
2676 | append_insns (&buildaddr, i, buf); | |
2677 | current_insn_ptr = buildaddr; | |
2678 | i386_emit_call (fn); | |
2679 | EMIT_ASM32 (i386_int_call_1_c, | |
2680 | "mov %edx,%ebx\n\t" | |
2681 | "lea 0x8(%esp),%esp"); | |
2682 | } | |
2683 | ||
4e29fb54 | 2684 | /* FN's prototype is `void(*fn)(int,LONGEST)'. */ |
6a271cae PA |
2685 | |
2686 | static void | |
2687 | i386_emit_void_call_2 (CORE_ADDR fn, int arg1) | |
2688 | { | |
2689 | unsigned char buf[16]; | |
2690 | int i; | |
2691 | CORE_ADDR buildaddr; | |
2692 | ||
2693 | EMIT_ASM32 (i386_void_call_2_a, | |
2694 | /* Preserve %eax only; we don't have to worry about %ebx. */ | |
2695 | "push %eax\n\t" | |
2696 | /* Reserve a bit of stack space for arguments. */ | |
2697 | "sub $0x10,%esp\n\t" | |
2698 | /* Copy "top" to the second argument position. (Note that | |
2699 | we can't assume function won't scribble on its | |
2700 | arguments, so don't try to restore from this.) */ | |
2701 | "mov %eax,4(%esp)\n\t" | |
2702 | "mov %ebx,8(%esp)"); | |
2703 | /* Put the first argument on the stack. */ | |
2704 | buildaddr = current_insn_ptr; | |
2705 | i = 0; | |
2706 | buf[i++] = 0xc7; /* movl $<arg1>,(%esp) */ | |
2707 | buf[i++] = 0x04; | |
2708 | buf[i++] = 0x24; | |
b00ad6ff | 2709 | memcpy (&buf[i], &arg1, sizeof (arg1)); |
6a271cae PA |
2710 | i += 4; |
2711 | append_insns (&buildaddr, i, buf); | |
2712 | current_insn_ptr = buildaddr; | |
2713 | i386_emit_call (fn); | |
2714 | EMIT_ASM32 (i386_void_call_2_b, | |
2715 | "lea 0x10(%esp),%esp\n\t" | |
2716 | /* Restore original stack top. */ | |
2717 | "pop %eax"); | |
2718 | } | |
2719 | ||
6b9801d4 | 2720 | |
df4a0200 | 2721 | static void |
6b9801d4 SS |
2722 | i386_emit_eq_goto (int *offset_p, int *size_p) |
2723 | { | |
2724 | EMIT_ASM32 (eq, | |
2725 | /* Check low half first, more likely to be decider */ | |
2726 | "cmpl %eax,(%esp)\n\t" | |
2727 | "jne .Leq_fallthru\n\t" | |
2728 | "cmpl %ebx,4(%esp)\n\t" | |
2729 | "jne .Leq_fallthru\n\t" | |
2730 | "lea 0x8(%esp),%esp\n\t" | |
2731 | "pop %eax\n\t" | |
2732 | "pop %ebx\n\t" | |
2733 | /* jmp, but don't trust the assembler to choose the right jump */ | |
2734 | ".byte 0xe9, 0x0, 0x0, 0x0, 0x0\n\t" | |
2735 | ".Leq_fallthru:\n\t" | |
2736 | "lea 0x8(%esp),%esp\n\t" | |
2737 | "pop %eax\n\t" | |
2738 | "pop %ebx"); | |
2739 | ||
2740 | if (offset_p) | |
2741 | *offset_p = 18; | |
2742 | if (size_p) | |
2743 | *size_p = 4; | |
2744 | } | |
2745 | ||
df4a0200 | 2746 | static void |
6b9801d4 SS |
2747 | i386_emit_ne_goto (int *offset_p, int *size_p) |
2748 | { | |
2749 | EMIT_ASM32 (ne, | |
2750 | /* Check low half first, more likely to be decider */ | |
2751 | "cmpl %eax,(%esp)\n\t" | |
2752 | "jne .Lne_jump\n\t" | |
2753 | "cmpl %ebx,4(%esp)\n\t" | |
2754 | "je .Lne_fallthru\n\t" | |
2755 | ".Lne_jump:\n\t" | |
2756 | "lea 0x8(%esp),%esp\n\t" | |
2757 | "pop %eax\n\t" | |
2758 | "pop %ebx\n\t" | |
2759 | /* jmp, but don't trust the assembler to choose the right jump */ | |
2760 | ".byte 0xe9, 0x0, 0x0, 0x0, 0x0\n\t" | |
2761 | ".Lne_fallthru:\n\t" | |
2762 | "lea 0x8(%esp),%esp\n\t" | |
2763 | "pop %eax\n\t" | |
2764 | "pop %ebx"); | |
2765 | ||
2766 | if (offset_p) | |
2767 | *offset_p = 18; | |
2768 | if (size_p) | |
2769 | *size_p = 4; | |
2770 | } | |
2771 | ||
df4a0200 | 2772 | static void |
6b9801d4 SS |
2773 | i386_emit_lt_goto (int *offset_p, int *size_p) |
2774 | { | |
2775 | EMIT_ASM32 (lt, | |
2776 | "cmpl %ebx,4(%esp)\n\t" | |
2777 | "jl .Llt_jump\n\t" | |
2778 | "jne .Llt_fallthru\n\t" | |
2779 | "cmpl %eax,(%esp)\n\t" | |
2780 | "jnl .Llt_fallthru\n\t" | |
2781 | ".Llt_jump:\n\t" | |
2782 | "lea 0x8(%esp),%esp\n\t" | |
2783 | "pop %eax\n\t" | |
2784 | "pop %ebx\n\t" | |
2785 | /* jmp, but don't trust the assembler to choose the right jump */ | |
2786 | ".byte 0xe9, 0x0, 0x0, 0x0, 0x0\n\t" | |
2787 | ".Llt_fallthru:\n\t" | |
2788 | "lea 0x8(%esp),%esp\n\t" | |
2789 | "pop %eax\n\t" | |
2790 | "pop %ebx"); | |
2791 | ||
2792 | if (offset_p) | |
2793 | *offset_p = 20; | |
2794 | if (size_p) | |
2795 | *size_p = 4; | |
2796 | } | |
2797 | ||
df4a0200 | 2798 | static void |
6b9801d4 SS |
2799 | i386_emit_le_goto (int *offset_p, int *size_p) |
2800 | { | |
2801 | EMIT_ASM32 (le, | |
2802 | "cmpl %ebx,4(%esp)\n\t" | |
2803 | "jle .Lle_jump\n\t" | |
2804 | "jne .Lle_fallthru\n\t" | |
2805 | "cmpl %eax,(%esp)\n\t" | |
2806 | "jnle .Lle_fallthru\n\t" | |
2807 | ".Lle_jump:\n\t" | |
2808 | "lea 0x8(%esp),%esp\n\t" | |
2809 | "pop %eax\n\t" | |
2810 | "pop %ebx\n\t" | |
2811 | /* jmp, but don't trust the assembler to choose the right jump */ | |
2812 | ".byte 0xe9, 0x0, 0x0, 0x0, 0x0\n\t" | |
2813 | ".Lle_fallthru:\n\t" | |
2814 | "lea 0x8(%esp),%esp\n\t" | |
2815 | "pop %eax\n\t" | |
2816 | "pop %ebx"); | |
2817 | ||
2818 | if (offset_p) | |
2819 | *offset_p = 20; | |
2820 | if (size_p) | |
2821 | *size_p = 4; | |
2822 | } | |
2823 | ||
df4a0200 | 2824 | static void |
6b9801d4 SS |
2825 | i386_emit_gt_goto (int *offset_p, int *size_p) |
2826 | { | |
2827 | EMIT_ASM32 (gt, | |
2828 | "cmpl %ebx,4(%esp)\n\t" | |
2829 | "jg .Lgt_jump\n\t" | |
2830 | "jne .Lgt_fallthru\n\t" | |
2831 | "cmpl %eax,(%esp)\n\t" | |
2832 | "jng .Lgt_fallthru\n\t" | |
2833 | ".Lgt_jump:\n\t" | |
2834 | "lea 0x8(%esp),%esp\n\t" | |
2835 | "pop %eax\n\t" | |
2836 | "pop %ebx\n\t" | |
2837 | /* jmp, but don't trust the assembler to choose the right jump */ | |
2838 | ".byte 0xe9, 0x0, 0x0, 0x0, 0x0\n\t" | |
2839 | ".Lgt_fallthru:\n\t" | |
2840 | "lea 0x8(%esp),%esp\n\t" | |
2841 | "pop %eax\n\t" | |
2842 | "pop %ebx"); | |
2843 | ||
2844 | if (offset_p) | |
2845 | *offset_p = 20; | |
2846 | if (size_p) | |
2847 | *size_p = 4; | |
2848 | } | |
2849 | ||
df4a0200 | 2850 | static void |
6b9801d4 SS |
2851 | i386_emit_ge_goto (int *offset_p, int *size_p) |
2852 | { | |
2853 | EMIT_ASM32 (ge, | |
2854 | "cmpl %ebx,4(%esp)\n\t" | |
2855 | "jge .Lge_jump\n\t" | |
2856 | "jne .Lge_fallthru\n\t" | |
2857 | "cmpl %eax,(%esp)\n\t" | |
2858 | "jnge .Lge_fallthru\n\t" | |
2859 | ".Lge_jump:\n\t" | |
2860 | "lea 0x8(%esp),%esp\n\t" | |
2861 | "pop %eax\n\t" | |
2862 | "pop %ebx\n\t" | |
2863 | /* jmp, but don't trust the assembler to choose the right jump */ | |
2864 | ".byte 0xe9, 0x0, 0x0, 0x0, 0x0\n\t" | |
2865 | ".Lge_fallthru:\n\t" | |
2866 | "lea 0x8(%esp),%esp\n\t" | |
2867 | "pop %eax\n\t" | |
2868 | "pop %ebx"); | |
2869 | ||
2870 | if (offset_p) | |
2871 | *offset_p = 20; | |
2872 | if (size_p) | |
2873 | *size_p = 4; | |
2874 | } | |
2875 | ||
6a271cae PA |
2876 | struct emit_ops i386_emit_ops = |
2877 | { | |
2878 | i386_emit_prologue, | |
2879 | i386_emit_epilogue, | |
2880 | i386_emit_add, | |
2881 | i386_emit_sub, | |
2882 | i386_emit_mul, | |
2883 | i386_emit_lsh, | |
2884 | i386_emit_rsh_signed, | |
2885 | i386_emit_rsh_unsigned, | |
2886 | i386_emit_ext, | |
2887 | i386_emit_log_not, | |
2888 | i386_emit_bit_and, | |
2889 | i386_emit_bit_or, | |
2890 | i386_emit_bit_xor, | |
2891 | i386_emit_bit_not, | |
2892 | i386_emit_equal, | |
2893 | i386_emit_less_signed, | |
2894 | i386_emit_less_unsigned, | |
2895 | i386_emit_ref, | |
2896 | i386_emit_if_goto, | |
2897 | i386_emit_goto, | |
2898 | i386_write_goto_address, | |
2899 | i386_emit_const, | |
2900 | i386_emit_call, | |
2901 | i386_emit_reg, | |
2902 | i386_emit_pop, | |
2903 | i386_emit_stack_flush, | |
2904 | i386_emit_zero_ext, | |
2905 | i386_emit_swap, | |
2906 | i386_emit_stack_adjust, | |
2907 | i386_emit_int_call_1, | |
6b9801d4 SS |
2908 | i386_emit_void_call_2, |
2909 | i386_emit_eq_goto, | |
2910 | i386_emit_ne_goto, | |
2911 | i386_emit_lt_goto, | |
2912 | i386_emit_le_goto, | |
2913 | i386_emit_gt_goto, | |
2914 | i386_emit_ge_goto | |
6a271cae PA |
2915 | }; |
2916 | ||
2917 | ||
2918 | static struct emit_ops * | |
2919 | x86_emit_ops (void) | |
2920 | { | |
2921 | #ifdef __x86_64__ | |
3aee8918 | 2922 | if (is_64bit_tdesc ()) |
6a271cae PA |
2923 | return &amd64_emit_ops; |
2924 | else | |
2925 | #endif | |
2926 | return &i386_emit_ops; | |
2927 | } | |
2928 | ||
3ca4edb6 | 2929 | /* Implementation of target ops method "sw_breakpoint_from_kind". */ |
dd373349 | 2930 | |
3ca4edb6 TBA |
2931 | const gdb_byte * |
2932 | x86_target::sw_breakpoint_from_kind (int kind, int *size) | |
dd373349 AT |
2933 | { |
2934 | *size = x86_breakpoint_len; | |
2935 | return x86_breakpoint; | |
2936 | } | |
2937 | ||
c2d6af84 PA |
2938 | static int |
2939 | x86_supports_range_stepping (void) | |
2940 | { | |
2941 | return 1; | |
2942 | } | |
2943 | ||
7d00775e AT |
2944 | /* Implementation of linux_target_ops method "supports_hardware_single_step". |
2945 | */ | |
2946 | ||
2947 | static int | |
2948 | x86_supports_hardware_single_step (void) | |
2949 | { | |
2950 | return 1; | |
2951 | } | |
2952 | ||
ae91f625 MK |
2953 | static int |
2954 | x86_get_ipa_tdesc_idx (void) | |
2955 | { | |
2956 | struct regcache *regcache = get_thread_regcache (current_thread, 0); | |
2957 | const struct target_desc *tdesc = regcache->tdesc; | |
2958 | ||
2959 | #ifdef __x86_64__ | |
b4570e4b | 2960 | return amd64_get_ipa_tdesc_idx (tdesc); |
ae91f625 MK |
2961 | #endif |
2962 | ||
f49ff000 | 2963 | if (tdesc == tdesc_i386_linux_no_xml) |
ae91f625 | 2964 | return X86_TDESC_SSE; |
ae91f625 | 2965 | |
f49ff000 | 2966 | return i386_get_ipa_tdesc_idx (tdesc); |
ae91f625 MK |
2967 | } |
2968 | ||
d0722149 DE |
2969 | /* This is initialized assuming an amd64 target. |
2970 | x86_arch_setup will correct it for i386 or amd64 targets. */ | |
2971 | ||
2972 | struct linux_target_ops the_low_target = | |
2973 | { | |
6a271cae | 2974 | x86_install_fast_tracepoint_jump_pad, |
405f8e94 SS |
2975 | x86_emit_ops, |
2976 | x86_get_min_fast_tracepoint_insn_len, | |
c2d6af84 | 2977 | x86_supports_range_stepping, |
7d00775e | 2978 | x86_supports_hardware_single_step, |
82075af2 | 2979 | x86_get_syscall_trapinfo, |
ae91f625 | 2980 | x86_get_ipa_tdesc_idx, |
d0722149 | 2981 | }; |
3aee8918 | 2982 | |
ef0478f6 TBA |
2983 | /* The linux target ops object. */ |
2984 | ||
2985 | linux_process_target *the_linux_target = &the_x86_target; | |
2986 | ||
3aee8918 PA |
2987 | void |
2988 | initialize_low_arch (void) | |
2989 | { | |
2990 | /* Initialize the Linux target descriptions. */ | |
2991 | #ifdef __x86_64__ | |
cc397f3a | 2992 | tdesc_amd64_linux_no_xml = allocate_target_description (); |
b4570e4b YQ |
2993 | copy_target_description (tdesc_amd64_linux_no_xml, |
2994 | amd64_linux_read_description (X86_XSTATE_SSE_MASK, | |
2995 | false)); | |
3aee8918 PA |
2996 | tdesc_amd64_linux_no_xml->xmltarget = xmltarget_amd64_linux_no_xml; |
2997 | #endif | |
f49ff000 | 2998 | |
cc397f3a | 2999 | tdesc_i386_linux_no_xml = allocate_target_description (); |
f49ff000 YQ |
3000 | copy_target_description (tdesc_i386_linux_no_xml, |
3001 | i386_linux_read_description (X86_XSTATE_SSE_MASK)); | |
3aee8918 PA |
3002 | tdesc_i386_linux_no_xml->xmltarget = xmltarget_i386_linux_no_xml; |
3003 | ||
3004 | initialize_regsets_info (&x86_regsets_info); | |
3005 | } |